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Syllabus

Evaluate: (A + 5)(3a - 2)(5a + 1) - Mathematics

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Question

Evaluate: (a + 5)(3a - 2)(5a + 1)

Sum
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Solution

(a + 5)(3a - 2)(5a + 1)

= {a (3a - 2) + 5(3a - 2)} (5a + 1)

= (3a2 - 2a + 15a - 10)(5a + 1)

= (3a2 + 13a - 10)(5a + 1)

= 5a (3a2 + 13a - 10) + 1 (3a2 + 13a - 10)

= 15a3 + 65a2 - 50a + 3a2 + 13a - 10

= 15a3 + 68a2 - 37a - 10 

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Performs Operations (Addition and Subtraction) on Algebraic Expressions with Integral Coefficients Only.
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Q 5.3
Chapter 11: Fundamental Concepts (Including Fundamental Operations) - Exercise 11 (C)

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Selina Concise Mathematics [English] Class 7 ICSE
Chapter 11 Fundamental Concepts (Including Fundamental Operations)
Exercise 11 (C) | Q 5.3

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