Question

como resolve (-2x-1).(x-2)=3x+5x²

Answer 1

$(-2x-1).(x-2)=3x+5x^2\\\\-2x^2-x+4x+2=3x+5x^2\\\\5x^2+2x^2+3x+x-4x-2=0\\\\7x^2+4x-4x-2=0\\\\7x^2=2\\\\x^2=\dfrac{2}{7} \\\\{\boxed{x= \frac{+}{-} \sqrt{ \dfrac{2}{7} } }$