Respuesta :

21gaennil
5x^2 + 10 = 15
5x^2 = 5
x^2 = 1
[tex] \sqrt{ x^{2} } [/tex] = [tex] \sqrt{1} [/tex]
[tex] \sqrt{1} = 1[/tex]
5x²+10=15
Subtract 10 from both sides
5x²=5
Divide by 5
x²= 1
Square root both
√x²=√1

Answer:   x=1