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\(x^2-3y^2-8z^2+2xy-10yz+2xz\)
\(=x^2-3y^2-8z^2+3xy-xy-4yz-6yz+4xz-2xz\)
\(=\left(x^2+3xy+4xz\right)+\left(-xy-3y^2-4yz\right)+\left(-2xz-6yz-8z^2\right)\)
\(=x\left(x+3y+4z\right)-y\left(x+3y+4z\right)-2z\left(x+3y+4z\right)\)
\(=\left(x+3y+4z\right)\left(x-y-2z\right)\)
\(2x-3x^2+x\)
\(=x\left(2-3x+1\right)\)
\(=x\left(-3x+3\right)\)
\(=-3x\left(x-1\right)\)
2x - 3x2 + x
=x.(2-3x+1)
=x.(3-3x)
=x.(3.(1-x))
=3x.(1-x)
\(x^3+2x^2-2x-12=x^3-2x^2+4x^2-8x+6x-12\)
\(=x^2\left(x-2\right)+4x\left(x-2\right)+6\left(x-2\right)=\left(x-2\right)\left(x^2+4x+6\right)\)
\(x^3+2x^2-2x-12\)
\(=x^3-2x^2+4x^2-8x+6x-12\)
\(=x^2\left(x-2\right)+4x\left(x-2\right)+6\left(x-2\right)\)
\(=\left(x-2\right)\left(x^2+4x+6\right)\)
hk tốt
^^
a) Ta có: \(a^3y^3+125\)
\(=\left(ay+5\right)\left(a^2y^2-5ay+25\right)\)
b) Ta có: \(8x^3-y^3-6xy\cdot\left(2x-y\right)\)
\(=\left(2x-y\right)\left(4x^2+2xy+y^2\right)-6xy\left(2x-y\right)\)
\(=\left(2x-y\right)\left(4x^2+2xy-6xy+y^2\right)\)
\(=\left(2x-y\right)^3\)
\(x^2-2x-35\)
\(=x^2-2x+1-36\)
\(=\left(x-1\right)^2-36\)
\(=\left(x-1\right)^2-6^2\)
\(=\left(x-1-6\right)\left(x-1+6\right)\)
\(=\left(x-7\right)\left(x+5\right)\)
Ủng hộ mik nha
Thanks @@@@@@