Question

1)resolva as equaçoes encompletas:
G)-x²+2=0
H)7x²=0
I)x²+13=0
J)-x²-5=0
K)x²-4=0
L)4x²-5x=0

Answer 1

Resposta:

Explicação passo a passo:

G)-x²+2=0

$-x^{2} =-2$ (-1)

$x^{2} =2\\x=\sqrt{2}$

H)7x²=0

$x^{2} =\frac{0}{7}$

x=$\sqrt{0}$ = x=0

I)x²+13=0

$x^{2} =-13\\x=\sqrt{-13}$

J)-x²-5=0

$-x^{2} =5$ (-1)

$x^{2} =-5\\x=\sqrt{-5}$

K)x²-4=0

$x^{2} =4\\x=\sqrt{4}$   x=2

L)4x²-5x=0

x(4x-5)=0

x=0

4x-5=0

4x=5

x=5/4