Question

Por favor me ajudem (X+2)(X-5)=144

Answer 1

(x+2)·(x-5)=144⇒x²-5x+2x-10=144⇒x²-3x-10-144=0⇒x²-3x-154=0
Δ=(-3)²-4·1·(-154)=9+616=625⇒√Δ=25
x'= (3+25)/2=28/2=14
x''=(3-25)/2= -22 / 2 = -11