Question

X²+8X+15 SU DEBIDO PROCEDIMIENTO

Answer 1

$X^2+8X+15$
$=\left(X^2+3X\right)+\left(5X+15\right)$
$=X\left(X+3\right)+5\left(X+3\right)$
$=\left(X+3\right)\left(X+5\right)$

$\left(x+3\right)\left(x+5\right)$
$=x\cdot \:x+x\cdot \:5+3\cdot \:x+3\cdot \:5$
$=x^2+8x+15$