Question

What's the answer to 5x^2+10=15

Answer 1

5x^2 + 10 = 15
5x^2 = 5
x^2 = 1
$\sqrt{ x^{2} }$ = $\sqrt{1}$
$\sqrt{1} = 1$

Answer 2

5x²+10=15
Subtract 10 from both sides
5x²=5
Divide by 5
x²= 1
Square root both
√x²=√1

Answer:   x=1