Question

what is the factor of 2 X square + 28 x + 90

Answer 1

2x^2+28x+90
= 2x^2+10x+18x+90
=2x(x+5)+18(x+5)
=(x+5)(2x+18)

i hope it will help you

Answer 2

$2x {2} + 28x + 90 \\ 2(x {}^{2} + 14x + 45) \\ 2(x {}^{2} + 9x + 5x + 45) \\ 2(x + 5)(x + 9)$