Question

resolva as equaçoes do 2 grau a)4x²-36=0
b)7x²-21=0

Answer 1

Olá :)

a)
4x²-36 = 0
4x² = 36
x² = 36/4
x² = 9
x = ±√9
x = ±3

b)
7x²-21 = 0
7x² = 21
x² = 21/7
x² = 3
x = ± √3
x ≈ ± 1,7