Algebraic Expressions and Identities (Practice Sheet, Class 8)

(1)Add the following expressions 2a + 5 + 3a2, 7a2 + 6

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(2) Find the product of 3a + 4 and 4a + 2

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(3) Subtract 12a + 2ab – 4b2 from 10a – 2ab + 5b2

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(4) Find the area rectangle whose length is a and breadth is b.

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(6) Find the value of (7a + 5b)2

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(7) Complete the identities

(a) (a + b)2 = a2 +__ + ___

(b) a2 – b2 =

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(8) Find the product of (6a + 4b)( 2a + 9b)

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(9) Show that (7a + 8b)2 + 72ab = 49a2 + 64b2 – 40ab

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(10) Show that 4a2 + 9b2 + 12ab – 24ab = (2a – 3b)2

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Helping Topics

Algebraic expressions and identities

NCERT solutions, class 8

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