Question

a) (x-3 )^2=2x^2
b) x(x-5)=-6

Answer 1

(x - 3) . (x - 3) = 2x . 2x 
$x^{2}$ - 3x - 3x + 9 = 4$x^{2}$
$x^{2}$ - 4$x^{2}$ - 6x + 9 = 
- 3$x^{2}$ - 6x + 9 = 0

b) $x^{2} - 5x = - 6$
    $x^{2} - 5x + 6$ = 0