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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


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Ex 10.2, 7 Simplify these expressions and find their values if x = 3, a = –1, b = -2 (iv) 10 – 3b – 4 – 5b 10 – 3b – 4 – 5b = b (–3 − 5) + (10 − 4) = b (−8) + 6 = −8b + 6 Putting b = −2 = −8(−2) + 6 = 16 + 6 = 22

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.