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7. Algebraic Expression, Identities and Factorisation
Home · Class 8 · Maths · NCERT - Exemplar Mathematics · 7. Algebraic Expression, Identities and Factorisation
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Q83 of 128 Page 224

Multiply the following:

(3x2 + 5x - 8), (2x2 – 4x + 3)

The multiplication is as follows:

(3x2 + 5x-8)×(2x2-4x + 3)


= 3x2.2x2-4x.3x2 + 3x2.3 + 5x.2x2-4x.5x + 5x.3-8.2x2 + 8.4x-8.3


= 6x4-12x3 + 9x3 + 10x3-20x2 + 15x-16x2 + 32x-24


= 6x4 + 7x3-36x2 + 47x-24


The product is = 6x4 + 7x3-36x2 + 47x-24


More from this chapter

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83

Multiply the following:

, (2p2 – 3q2)

83

Multiply the following:

(x2 – 5x + 6), (2x + 7)

83

Multiply the following:

(2x – 2y - 3), (x + y + 5)

84

Simplify

(3x + 2y)2 + (3x – 2y)2

Questions · 128
7. Algebraic Expression, Identities and Factorisation
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