Select the approximate values of x that are solutions to f(x) = 0,

Question

where f(x) = -7x2 + 2x + 2.? 

 

Update : A. {–0.41, 0.70} 

B. {-7, 2} 

C. {–0.29, –0.29} 

D. {–3.50, 1.00}

 

Answer 1

The function is -7x² + 2x + 2 = 0.

Compare the equation -7x² + 2x + 2 = 0 with general form of quadratic equation ax² + bx + c = 0.

a = -7, b = 2 and c = 2.

Substitute a = -7, b = 2 and c = 2 in the quadratic formula : .

The option A is correct.