# Ex 12.2, 2 (iii) - Chapter 12 Class 7 Algebraic Expressions

Last updated at Sept. 6, 2021 by Teachoo

Last updated at Sept. 6, 2021 by Teachoo

Transcript

Ex 12.2, 2 Add: (iii) – 7mn + 5, 12mn + 2, 9mn – 8, – 2mn – 3 (–7mn + 5) + (12mn + 2) + (9mn – 8) + (–2mn – 3) = –7mn + 5 + 12mn + 2 + 9mn – 8 – 2mn – 3 = –7mn + 12mn + 9mn – 2mn + 5 + 2 – 8 – 3 = mn (–7 + 12 + 9 – 2) + (5 + 2 – 8 – 3) = mn (12 + 9 – 7 – 2) + (5 + 2 – 8 – 3) = mn (21 – 9) + (7 – 11) = mn (12) + (– 4) = 12mn – 4

Ex 12.2

Ex 12.2, 1 (i)

Ex 12.2, 1 (ii)

Ex 12.2, 1 (iii)

Ex 12.2, 1 (iv)

Ex 12.2, 1 (v)

Ex 12.2, 1 (vi)

Ex 12.2, 2 (i)

Ex 12.2, 2 (ii)

Ex 12.2, 2 (iii) You are here

Ex 12.2, 2 (iv)

Ex 12.2, 2 (v)

Ex 12.2, 2 (vi)

Ex 12.2, 2 (vii)

Ex 12.2, 2 (viii)

Ex 12.2, 2 (ix)

Ex 12.2, 2 (x)

Ex 12.2, 3 (i) Important

Ex 12.2, 3 (ii)

Ex 12.2, 3 (iii)

Ex 12.2, 3 (iv)

Ex 12.2, 3 (v)

Ex 12.2, 3 (vi)

Ex 12.2, 3 (vii)

Ex 12.2, 3 (viii)

Ex 12.2, 4 (a) Important

Ex 12.2, 4 (b)

Ex 12.2, 5 Important

Ex 12.2, 6 (a)

Ex 12.2, 6 (b)

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