Simplify, (4a - 2b)(a + b)?

Question

4a^2 - 6ab - 2b^2
4a^2 - 2ab - 2b^2
4a^2 - 8ab - 2b^2
4a^2 + 2ab - 2b^2

Answer 1

(4a-2b)(a+b)
=(4a*a + 4a*b + (-2b)*a + (-2b)*b)
=(4a² + 4ab - 2ba -2b²)
=4a² + 2ab - b²

Answer 2

By Using Foil (First Outside Inside Last) Method expression can be simplified as
(4a - 2b)(a + b)
= 4a * a + 4a * b + (-2b) * a + (-2b) * b
=4a^2 + 4ab -2ab -2b^2
=4a^2 + 2ab -2b^2

Answer 3

Option D is right choice. Casacop answer is right.

Answer 4

Hi
(4a-2b)(a+b)
=(4a*a + 4a*b + (-2b)*a + (-2b)*b)
=(4a² + 4ab - 2ba -2b²)
=4a² + 2ab - b²

Hope I helped :)

Source: answers.yahoo.com