NCERT Class 7 Mathematics

(Ron) #1
ANSWERS 305

(f) 1.2ab–2.4b+3.6a 1.2ab 1.2,a,b
–2.4b – 2.4, b
3.6a 3.6, a

(g)^3144 x^34 x^34 ,x

1
4

1
4
(h) 0.1p^2 + 0.2q^2 0.1p^2 0.1, p, p
0.2q^2 0.2, q,q


  1. Expression Terms Coefficients


(i) 5 – 3t^2 – 3 t^2 –3
(ii) 1 + t + t^2 + t^3 t 1
t^21
t^31
(iii) x+ 2xy+ 3yx 1
2 xy 2
3 y 3
(iv) 100m +1000n 100m 100
1000n 1000
(v) – p^2 q^2 + 7pq – p^2 q^2 –1
7 pq 7
(vi) 1.2a + 0.8b 1.2a 1.2
0.8b 0.8
(vii) 3.14r^2 3.14r^2 3.14
(viii) 2(l+ b)2l 2
2 b 2
(ix) 0.1y + 0.01y^2 0.1y 0.1
0.01y^2 0.01


  1. (a) Expression Terms with x Coefficient of x


(i) y^2 x + yy^2 xy^2
(ii) 13 y^2 –8yx – 8yx – 8y
(iii) x + y + 2 x 1
(iv) 5 + z + zx zx z
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