Question

Can someone please answer question 12a or if its to hard can you try 12b? Please and Thank You

Answer 1

In a

Open right hand side and you will get answer

Answer 2

Given Equation:

$4 - (x + 2)^{2} = -x(x + 4)$

$4 - x^{2} - 2x - 4 = -x(x + 4)$

$4 - x^{2} - 2x - 4 = -x^{2} - 4x)$

$- 2x = - 4x$

Hence proved LHS ≠ RHS