Question

Help me

Answer 1

Ta có: \(8x^5y^3x^2+\left(-2\right)x^6y^3x+\left(-6\right)x^7y^3\)

\(=8x^7y^3+\left(-2\right)x^7y^3+\left(-6\right)x^7y^3\)

\(=\left[8+\left(-2\right)+\left(-6\right)\right]x^7y^3\)

\(=0x^7y^3=0\)

hay \(Ax^2+Bx+C=0\rightarrowđpcm.\)

Answer 2

a) \(Ax^2=8x^7y^3\)

\(Bx=-2x^7y^3\)

\(\Rightarrow Ax^2+Bx+C=8x^7y^3-2x^7y^3-6x^7y^3\)

\(=\left(8-6-2\right)x^7y^3\)

\(=0\)

\(\Rightarrow Ax^2+Bx+C=0\left(đpcm\right)\)