Question

matemática quantos e z²=225​

Answer 1

Explicação passo a passo:

z² = 225

z² = 15²

z = 15 >>>>>>resposta

Answer 2

$z {}^{2} = 225 \\ z {}^{2} = 225 \\ z {}^{2} - 225 = 225 - 225 \\ z {}^{2} = 225 = 0 \\ z {}^{2} = 225 \\ z {}^{2} - 225 = 0 \\ z {}^{2} - 225 \\ z {}^{2} - 15 {}^{2} \\ (z - 15) \times (z + 15) \\ z {}^{2} - 225 = 0 \\ (z - 15) \times (z + 15) = 0 \\ z - 15 = 0 \\ z + 15 = 0 \\ z - 15 = 0 \\ z - 15 + 15 = 0 + 15 \\ z = 0 + 15 \\ z - 15 + 15 = 0 + 15 \\ z = 15 \\ z - 15 = 0 \\ z + 15 = 0 \\ z = 15 \\ z + 15 = 0 \\ z + 15 - 15 = 0 - 15 \\ z = 0 - 15 \\ z + 15 - 15 = 0 - 15 \\z = - 15 \\ z - 15 = 0 \\ z +15 = 0 \\ z = 15 \\ z = - 15 \\ z_{1} = - 15 \: \: z_{2} = 15 \\ resposta \\ z_{1} = - 15 \: \: z_{2} = 15$