Question

(-3x2 + 2xy - 7y2) - (-2x2 – 8xy + 6y2 - 8x)=

Answer 1

Respuesta:

$\left(-3x2\:+\:2xy\:-\:7y2\right)\:-\:\left(-2x2\:-\:8xy\:+\:6y2\:-\:8x\right)\\\\\left(-3x^2+2xy-7y^2\right)-\left(-2x^2-8xy+6y^2-8x\right)\\\\=-3x^2+2xy-7y^2-\left(-2x^2-8xy+6y^2-8x\right)\\\\=-3x^2+2xy-7y^2+2x^2+8xy-6y^2+8x\\\\=-x^2+10xy+8x-13y^2$