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Multiply the following: (x2 – 5x + 6), (2x + 7) - Mathematics

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Question

Multiply the following:  

(x2 – 5x + 6), (2x + 7)

Sum

Solution

We have,

(x2 – 5x + 6) and (2x + 7)

∴ (x2 – 5x + 6)(2x + 7) = x2(2x + 7) – 5x(2x + 7) + 6(2x + 7)

= 2x3 + 7x2 – 10x2 – 35x + 12x + 42

= 2x3 – 3x2 – 23x + 42

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Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 231]

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NCERT Exemplar Mathematics [English] Class 8
Chapter 7 Algebraic Expression, Identities and Factorisation
Exercise | Q 83. (xx) | Page 231

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