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Searching4You 26/07/2017 at 11:22Real Egst ?
a) \(x-x^2+x^3-x^4\)
\(\Leftrightarrow x\cdot\left(1-x\right)+x^3\cdot\left(1-x\right)\)
\(\Leftrightarrow\left(x+x^3\right)\cdot\left(1-x\right)\)
b) \(x^2+2x+3x+x\)
\(\Leftrightarrow x\cdot\left(x+6\right)\)
Selected by MathYouLike -
Hiệp Dương 26/07/2017 at 11:21We have : x - x2 + x3 - x4
= (x - x2) + (x3 - x4)
= x(1 - x) + x3(1 - x)
= (1 - x)(x + x3)
= (1 - x).x(1 + x2)
b) ?