Question

(x-5)² =3 minha dúvida ​

Answer 1

Boa Noite, vamos lá calcular?

Answer 2

(x - 5)² = 3

(x - 5) • (x - 5) = 3

x² - 5x - 5x + 25 = 3

x² - 10x + 25 = 3

x² - 10x + 25 - 3 = 0

x² - 10x + 22 = 0

A= 1

B= - 10

C= 22

∆= b² - 4ac

∆= ( - 10)² - 4 • 1 • 22

∆= 100 - 88

∆= 12

x= - b ± √∆/2a

x= - ( - 10) ± √12 / 2 • 1

x= 10 ± √12 / 2

x'= 10 + √12 / 2

x"= 10 - √12/2