Question

X AO QUADRADO MENOS SETE MAIS DEZ IGUAL A ZERO

Answer 1

x² - 7 + 10 = 0          

a= 1                          
b= -7
c= 10

Δ=b²-4.a.c
Δ=(-7)²-4.1.10
Δ=49-40
Δ=9


x=-b+/-√b²-4.a.c
          2.a
x=-(-7)+/-√(-7)²-4.1.10
          2.1
x=7+/-√49-40
          2
x=7+/-√9    →→→→         x₁ = 7+9=16:2= 8         
       2                                       2      2:2   1

                 →→→→         x₂ = 7-9= 2:2= 1
                                               2     2:2   1

Espero ter ajudado! ;)