Question

3+ raiz quadrada de 2 é raiz da equacao x²- 6x + 7=0

Answer 1

x² - 6x + 7 = 0
a=1  b=-6  c=7

delta= b² - 4 (a)(c)
delta= 36 -28
delta= 8

x= -b $+-\sqrt{delta}$ ÷ 2a
x= 36 +-√8 ÷2
x= 18 +-√4 ÷2
x= 18 +- 2 ÷2

x1=10
x2=8