Question

3x^2=21 What are the solutions?

Answer 1

x= +2.64575 or -2.64575

Answer 2

so the answer is x=2.65, -2.65?

Answer 3

yes

Answer 4

Divide both sides by 3, you get \(x^2=7\), that implies that x is either \(\sqrt {7}\) or \(-\sqrt{7}\).

Answer 5

thank you