a) 5x\(^2\).(3x\(^2\) – 7x + 2)
a) \(5x^2.(3x^2-7x+2)=15x^4-35x^3+10x^2\)
b) \(\dfrac{2}{3}xy.(2x^2y-3xy+y^2)=\dfrac{4}{3}x^3y^2-2x^2y^2+\dfrac{2}{3}xy^3\)
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