Question

Which of the following are solutions to the equation below?

4x^2 + 4x + 1 = 9


Check all that apply

Answer 1

option b. –2 and d. 1 are correct.

*For detailed explanation refer to the attachment

Answer 2

Option B and D

Explanation:

Subtract 9 from both sides :

4x² + 4x - 8 = 0

Divide both sides by 4 :

x² + x - 2 = 0

Factorise using factorisation method :

x² - x + 2x -2 = 0

x(x - 1) +2(x-1) = 0

(x+2)(x-1) = 0

Solve for x

x +2 = 0 OR x - 1 = 0

x = -2 OR x = 1

Answer will be Option B and D

Hope this helped and have a good day