Question

2x2 – 125 = 0 ??? ajuda ai

Answer 1

Explicação passo-a-passo:

$\sf 2x^2-125=0$

$\sf 2x^2=125$

$\sf x^2=\dfrac{125}{2}$

$\sf x=\pm\sqrt{\dfrac{125}{2}}$

$\sf x=\pm\dfrac{5\sqrt{5}}{\sqrt{2}}\cdot\dfrac{\sqrt{2}}{\sqrt{2}}$

$\sf x=\pm\dfrac{5\sqrt{10}}{2}$

• $\sf x'=\dfrac{5\sqrt{10}}{2}$

• $\sf x"=\dfrac{-5\sqrt{10}}{2}$