Question

18x²-288 igual a 0, me ajudem

Answer 1

18x² - 288 = 0

18x² = 288
x²= 288/18
x² = 16
x' = 4 e x'' = -4

As raízes são 4 e -4

Answer 2

18x²-288=0
∆=b²-4ac (nesse caso n tem o "b")
∆=0²-4.18.(-288)
∆=0+20736
∆=20736

X=-b±√∆/2a
X=-0±√20736/2a
X=0±144/2.18

X'=0+144/36
X'=144/36=4

X"=0-144/36
X"=-144/36=-4