Question

Resolva as equaçoes do 2 grau incompletas. 2x² - 288=0 e 5x² -75x=0

Answer 1

$2x^{2}$-288=0
$2x^{2}$=288
$x^{2}$=288/2
$x^{2}$=144
x= $\sqrt{144}$
x = 12

$5x^{2}$-75x=0

$\sqrt{Δ}$= 5625-4*5*0
Δ= 5625

x= 75 +-$\sqrt{Δ}$ / 2*5
x1= 75+75 / 10 ⇒ 15
x2= 75-75 / 10 ⇒ 0 / 10 ⇒ 0                            S={15;0}