Question

4x2 + 2x = 12
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Answer 1

$4x^2+2x=12\\ \\simplificamos\ la\ ecuaci\'on\ dividiendo\ por\ 2\\ \\2x^2+x=6\\ \\ 2x^2+x-6=0\\ \\ la\ resolvemos\\ \\ x=\frac{-1\pm\sqrt{1+48}}{2\cdot2}=\frac{-1\pm\sqrt{49}}{4}=\frac{-1\pm7}{4}\\ \\las\ soluciones:\ \\ \\x_1=\frac{-1+7}{4}=\frac{3}{2}\\ \\x_2=\frac{-1-7}{4}=\frac{-8}{4}=-2$