Question

Resolva as equações.
a) √x+2=7
b) √3x+1 + 6=2
c) √5x -10 = √3x + 2

Answer 1

a)
√x + 2 = 7
√x = 7 - 2
√x = 5
x = 5²
x = 25

b)
√3x+1 + 6 = 2
√3x+1 = 2 - 6
√3x + 1 = -4
3x + 1 = - 4²
3x + 1 = 16
3x = 16-1
3x = 15
x = 15 / 3
x = 5

c)
√5x - 10 = √3x + 2
√5x = √3x +12
5x = (√3x + 12)²
5x = 3x + 12
2x = 12
x = 12 / 2
x = 6

Um abraço!