\(2x^2\left(3x-5x^3\right)+10x^5-5x^3\)
\(=\left(6x^3-10x^5\right)+10x^5-5x^3\)
\(=6x^3-10x^5+10x^5-5x^3\)
\(=\left(6x^3-5x^3\right)-\left(10^5-10^5\right)\)
\(=x^3\)
\(\left(x+2\right)\left(x^2-2x+4\right)+\left(x-4\right)\left(x+2\right)\)
\(=\left(x+2\right)\left[\left(x^2-2x+4\right)\right]+\left(x-4\right)\)
\(=\left(x+2\right)\left(x^2-2x+4+x-4\right)\)
\(=\left(x+2\right)\left[\left(x-2x\right)+\left(4-4\right)+x^2\right]\)
\(=\left(x+2\right)\left(-1+x\right)\)
\(=-x+x^2+\left(-2\right)+2x\)
\(=x+x^2+\left(-2\right)\)
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x2 ( 2x3 – 4x + 3)
