Question

x² +x/2 =14 ME AJUDA A RESOLVER ESTA MERDITA

Answer 1

Resposta:

x² +x/2 = 14

x² +x/2 -14 = 0

colocando tudo na base 2

(2x² + x - 28)/2 = 0/2

2x² + x - 28 =0

Agora aplica a formula de bhaskara para a=2; b=1 e c=-28

$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$x=\frac{-1+\sqrt{1^2-4\cdot \:2\left(-28\right)}}{2\cdot \:2} = \quad \frac{7}{2}$

$x=\frac{-1-\sqrt{1^2-4\cdot \:2\left(-28\right)}}{2\cdot \:2} = \quad -4$