Welcome :: Homework Help and Answers :: Mathskey.com

Q&A
Unanswered
Categories
Users
Ask a Question

Welcome to Mathskey.com Question & Answers Community. Ask any math/science homework question and receive answers from other members of the community.

Q&A Categories
BASIC MATH (93)
PRE-ALGEBRA (441)
ALGEBRA 1 (2,220)
GEOMETRY (864)
ALGEBRA 2 (2,751)
TRIGONOMETRY (1,187)
PRECALCULUS (1,903)
CALCULUS (2,802)
STATISTICS (129)
PHYSICS (659)
CHEMISTRY (137)
MECHANICAL ENGINEERING (64)
ELECTRICAL ENGINEERING (207)
Winplot Tutorials (2)

Most popular tags

solving-equations system-of-equations functions math slope-intercept-form physics homework-help trigonometric-identities integration limits substitution-method calculus

13,459 questions

17,854 answers

1,446 comments

807,733 users

y=-x^2+4x-4

0 votes

find the two roots.

rational-expressions
solving-equations

asked Mar 11, 2014 in ALGEBRA 1 by skylar Apprentice

Share this question

Google+ Facebook Twitter LinkedIn Reddit

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

0 votes

The equation is y = - x² + 4x - 4.

To find the two roots, substitute y = 0 in the original equation.

0 = - x² + 4x - 4

0 = - [x² - 2(2)(x) + 2²]

Apply Perfect Square Trinomial : (u² - 2uv + v²) = (u - v)².

0 = (x - 2)²

0 = (x - 2)

x = 2.

The roots are 2 and 2.

answered Sep 1, 2014 by casacop Expert

Please log in or register to add a comment.

Related questions

f(x)=x^5-3x^4-5x^3+4x-12

asked Mar 12, 2014 in ALGEBRA 2 by angel12 Scholar

zeros-of-the-function
rational-expressions

Is (√(x+2))/(x^(2)+4) a rational expression?

asked Nov 21, 2013 in ALGEBRA 1 by payton Apprentice

rational-expressions

simplify the rational expression 2(x+4)(x-2)/3x^2-12x+12

asked Nov 21, 2013 in ALGEBRA 1 by dkinz Apprentice

rational-expressions

solve and check x + y = -2; y = 4x - 7

asked Mar 12, 2014 in ALGEBRA 1 by abstain12 Apprentice

solving-equations
system-of-equations

x-4/x^3-8x^2+4x-9

asked Mar 12, 2014 in ALGEBRA 2 by chrisgirl Apprentice

solving-equations

how to multiply rational expression of (x^2 + xy / 15y^3) (35y^2 / 6x+6y) (12x / 10y^2)

asked Nov 21, 2013 in ALGEBRA 2 by skylar Apprentice

rational-expressions

if the ratio 25 : 4x = x : 4, what is x?

asked Feb 19, 2014 in ALGEBRA 1 by dkinz Apprentice

solving-equations

If x+1/x = 5 then!!!!!!!!!!!!!!!!!!!!!

asked Feb 15, 2013 in ALGEBRA 1 by andrew Scholar

rational-expressions

What is x-y+=2 and 4x-3y=11 using substitution method.

asked Mar 10, 2014 in ALGEBRA 2 by futai Scholar

system-of-equations
solving-equations
substitution-method

solve the system -x+y=2 and 4x-3y=-7

asked Mar 1, 2014 in GEOMETRY by homeworkhelp Mentor

system-of-equations
solving-equations
elimination-method
substitution-method

find the real roots of y=-x^2-4x-2

asked Feb 24, 2014 in ALGEBRA 2 by chrisgirl Apprentice

roots-of-polynomials
solving-equations
polynomial-function

solve and check 6y-4x=32 and -y+x=-7

asked Mar 12, 2014 in ALGEBRA 1 by abstain12 Apprentice

solving-equations
system-of-equations

evaluate 4x − 2y if x = −1 and y = −5

asked Feb 28, 2014 in ALGEBRA 1 by chrisgirl Apprentice

evaluate-the-expression
solving-equations

6x-y=3 and 4x-2y=-2

asked Feb 28, 2014 in ALGEBRA 1 by futai Scholar

evaluate-the-expression
solving-equations

solve for , 2x-y+z=4, 4x+y-z=14 and z+3y-z=11

asked Mar 8, 2014 in ALGEBRA 2 by linda Scholar

system-of-equations
solving-equations
elimination-method
substitution-method

2y(4-x)=x/2 when x=2 i know y is 1/4 but i dont know how i got there...please help.

asked Mar 13, 2014 in PRE-ALGEBRA by payton Apprentice

solving-equations

sketch y=(x+2)(x-1)(x-4)

asked Mar 11, 2014 in ALGEBRA 2 by andrew Scholar

solving-equations
polynomial-function

x+y=4 and x-y=2

asked Mar 8, 2014 in ALGEBRA 2 by futai Scholar

solving-equations
system-of-equations
graphical-method

If y varies directly as x, what is the value of y in these ordered pairs? (4, 16) and (2, y)

asked Mar 4, 2014 in ALGEBRA 2 by payton Apprentice

solving-equations
direct-variation

2x+3y= 21 and 3x-y=4 solve for x and y

asked Feb 1, 2017 in ALGEBRA 1 by anonymous

solving-equations

Copyright © 2024 MATHSKEY. All Rights Reserved. Sitemap|Terms Of Use|Disclaimer|Contact Us|FAQ

...