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Question

Multiply :

(i) 2x24x+5 by x2+3x7

(ii) (ab1)(32ab)

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Solution

(i) 2x24x+5 by x2+3x72x24x+5 by x2+3x7(2x24x+5)×(x2+3x7)2x2(x2+3x7)4x(x2+3x7)+5(x2+3x7)2x4+6x314x24x312x2+28x+5x2+15x352x4+6x34x314x212x2+5x2+28x+15x352x4+2x321x2+43x35(ii) (ab1)(32ab)ab(32ab)1(32ab)3ab2a2b23+2ab2a2b2+5ab32a2b25ab+3


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