Question

$\frac{X ^2 +7x+1{2}= }{ x^{2} +8x+16}$

Answer 1

=(x+3)(x+4)/(x+4)(x+4) se simplifica⇒(x+3)/(x+4)
cond:x+4≠0⇒x≠ -4
atunci x+3=0⇒x= -3