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Differentiate (x^2-5x+8)(x^3+7x+9)by usi...

Differentiate `(x^2-5x+8)(x^3+7x+9)`by using product rule

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Required derivative `=(x^2-5x+8)(3x^2+7)+(x^3+7x+9)(2x-5)=3x^4+7x^2-15x^3-35x+24x^2+56+2x^4-5x^3+14x^2-35x+18x-45=5x^4-20x^3+45x^2-52x+11`
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