Question

Find the solutions x^2=18

Answer 1

x₁ = -3√2

x₂ = 3√2

Explanation:

x² = 18

x ± 3√2

x = -3√2

x = 3√2

Hope this helped! :)

Answer 2

x₁ = -3√2 , x₂ = 3√2

Explanation:

x² = 18 ⇔ x = √18 or x= -√18

√18 = √[9•2] = √9•√2 = 3•√2 = 3√2