Question

what should be added to7x²-7x + 6 to get 9x²+3

Answer 1

$7x^2-7x+x=9x^2+3// 7x^2-6x=9x^+3// 7x^2-9x^2=3+6x// -2x^2=3+6x// -4x-6x=3// -10x=3// x=3/-10×-1/-1// x=-3/10$