Ex 10.2, 2 - Chapter 10 Class 7 Algebraic Expressions

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Ex 10.2, 2 If p = – 2, find the value of: (i) 4p + 7 4p + 7 Putting p = −2 = 4 (−2) + 7 = − 8 + 7 = −1 Ex 10.2, 2 If p = – 2, find the value of: (ii) – 3p2 + 4p + 7 Ex 10.2, 2 If p = – 2, find the value of: (iii) – 2p3 – 3p2 + 4p + 7 – 2p3 – 3p2 + 4p + 7 Putting p = −2 = −2 (−2)3 − 3 (−2)2 + 4 (−2) + 7 = −2 (−8) − 3 (4) − 8 + 7 = 16 − 12 − 1 = 4 − 1 = 3

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