Question

Solve the following quadratic equation: $x^2=15$

• A. x= √15
• B. x= - √15
• C. x = √15 or x = - √15
• D. x = ± 15

Answer 1

The correct option is C

x = √15 or x = - √15

x = $-\sqrt{1}5$ or x = $\sqrt{1}5$ because on squaring both $\sqrt{1}5$ and $-\sqrt{1}5$,
we get 15.