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Ex 12.3, 7 (v) - Chapter 12 Class 7 Algebraic Expressions
Last updated at March 16, 2023 by Teachoo
Ex 12.3
Ex 12.3, 1
Ex 12.3, 2 Important
Ex 12.3, 3
Ex 12.3, 4
Ex 12.3, 5 Important
Ex 12.3, 6 (i)
Ex 12.3, 6 (ii) Important
Ex 12.3, 6 (iii)
Ex 12.3, 6 (iv) Important
Ex 12.3, 7 (i) Important
Ex 12.3, 7 (ii)
Ex 12.3, 7 (iii) Important
Ex 12.3, 7 (iv)
Ex 12.3, 7 (v) Important You are here
Ex 12.3, 8 (i)
Ex 12.3, 8 (ii) Important
Ex 12.3, 9 Important
Ex 12.3, 10
Transcript
Ex 12.3, 7 Simplify these expressions and find their values if x = 3, a = –1, b = -2 (v) 2a – 2b – 4 – 5 + a 2a – 2b – 4 – 5 + a = a (2 + 1) − 2b + (−4 − 5) = a (3) − 2b − 9 = 3a − 2b − 9 Putting a = −1, b = −2 = 3 (−1) − 2 (−2) − 9 = −3 + 4 − 9 = 1 − 9 = −8
