Question

PRECISO DE CONTA !!!
2- Resolva as raízes das equações abaixo:
a) 2x2 - 50 = 0
b) 2x2-2=0
c) 5x2 + 10x = 0
d) -2x2+28x = 0

Answer 1

Resposta:

$2x^{2} - 50 =$ x²=$\frac{50}{2}$ -> x²=25 -> x= 5

$2x^{2} - 2$ -> x²=$\frac{2}{2}$ -> x²=1 -> x=1

$5x^{2} + 10x=0$ -> 5x(x+10) -> x1= 0 x2= -10

$-2x^{2} + 28x$ -> 2x(-x + 28) -> x1= 0 x2= 28