\(a,\left(-\dfrac{1}{4}x^3\right)\cdot\left(-8xy^2\right)\)
\(=\left[\left(-\dfrac{1}{4}\right)\cdot\left(-8\right)\right]\cdot\left(x^3\cdot xy^2\right)\)
\(=2x^4y^2\)
\(b,\left(-\dfrac{1}{3}x^2y\right)\cdot\left(-\dfrac{2}{3}xy^3\right)\cdot\left(1\dfrac{1}{2}xy^2\right)\)
\(=\left[\left(-\dfrac{1}{3}\right)\cdot\left(-\dfrac{2}{3}\right)\cdot\dfrac{3}{2}\right]\cdot\left(x^2y\cdot xy^3\cdot xy^2\right)\)
\(=\dfrac{1}{3}x^4y^6\)
\(c,\left(-0,1x^3y\right)^3\)
\(=\left(-0,1\right)^3\cdot\left(x^3y\right)^3\)
\(=-0,001x^9y^3\)
#Urushi☕
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