Multiply: 2m2 − 3m − 1 and 4m2 − M − 1 - Mathematics

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Sum

Multiply: 2m2 − 3m − 1 and 4m2 − m − 1

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Solution

(2m2 − 3m − 1) (4m2 − m − 1)

= 2m2(4m2 −  m −  1) − 3m(4m2 −  m − 1) −1(4m2 − m −1)

= 8m4 − 2m3− 2m2 − 12m3 + 3m2 + 3m −  4m2 + m + 1

= 8m4 − 14m3 − 6m2 + 3m2 + 4m + 1

= 8m4 − 14m3 − 3m2 + 4m + 1 

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Chapter 11: Algebraic Expressions - Exercise 11 (C) [Page 143]

APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 11 Algebraic Expressions
Exercise 11 (C) | Q 1.11 | Page 143

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