Question

x^{2} -25=0 [tex] x^{2} -25=0
x^{2} + x^{2} -128=0

Answer 1

x²-25= 0
x²= 25
x= √25
x= +-5

x²+x²-128= 0
2x²-128= 0
2x²= 128
x²= 128/2
x²= 64
x= √64
x= +-8

Answer 2

Olá Larapaiva2,

Letra A)
X^2 - 25
X = raiz de 25
X' = 5
X" = -5
---------------------
Letra B)
X^2 + X^2 - 128 = 0
2X^2 - 128 = 0
2X^2 = 128
X^2 = 128/2
X^2 = 64
X = raiz de 64
X' = 8
X" = -8.

Espero ter ajudado, bons estudos!