Question

Equaçao do 2 grau

-4x²+x+3=0

Answer 1

Resposta:

$-4x^2+x+3=0\quad :\quad x=-\frac{3}{4},\:x=1$

Explicação passo a passo:

$-4x^2+x+3=0\\\\x_{1,\:2}=\frac{-1\pm \sqrt{1^2-4\left(-4\right)\cdot \:3}}{2\left(-4\right)}\\x_{1,\:2}=\frac{-1\pm \:7}{2\left(-4\right)}\\x_1=\frac{-1+7}{2\left(-4\right)},\:x_2=\frac{-1-7}{2\left(-4\right)}\\x=-\frac{3}{4},\:x=1\\\\s[-\frac{3}{4},1]$