Question

3. Subtract:
(i) _5y2 from y?
(ii) 6xy from -12xy
(ii) (a - b) from (a + b)
(iv) a (b-5) from b (5-a)
(v) –m² + 5mn from 4m2 - 3mn + 8
(vi) – x2 + 10x - 5 from 5x – 10
(vii) 5a? - 7ab + 5b2 from 3ab - 2a- 262
(viii) 4pq – 5q2 – 3p2 from 5p2 + 3q? - pq
NCERT math class-7 chapter 12​

Answer 1

I) = 6y2

II) = -12xy-6xy

= -18xy

III) = (a+b) - (a-b)

= a+b-a+b

= a-a+b+b

= 2b

iv) = 5a+5b-2ab

v) = 5m²-8mn+8

vi) = x²-5x-5

vii) = -7a²-7b²+10ab

viii) = 8p² + 8q²-5pq

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