Question

The expression given in (ii) contains
The expressioni gi
pression given in (iv) contains four terms. so it is none of the give
EXAMPLE 3.
Write down the coefficient of
(i) x in 9xy
(iv) b in -abc
ty
(ii) a in -7abc
(iii) xyz in -xyz
Solution
(i) The coefficient of x in 9xy is gy.
(ii) The coefficient of a in - 7 abc is -
(iii) The coefficient of xyz in - XYZ IS
(iv) The coefficient of b in -abc is -ac.
(iii) ab - a?
(vi) a' - 68
EXERCISE 8B
1. If a = 2 and b = 3, find the value of
(i) a + b
(ii) a² + ab
(iv) 2a -3b
(V) 5a2 - 2ab
2. If x = 1, y = 2 and 2 =5, find the value of
al (i) 3x - 2y + 4z
(ii) x² + y² + 2?
liv) xy + yz - zx
(v) 2xºy - 5yz + xy?
13/If p = -2, q=-1 and r = 3, find the value of
(1) p² +9² - 1² . ((ii) 2p² - q² + 31²
(iv) p + q° +1° + 3 par 3p’q +5 pq? +2 par
(iii) 2x2 - 3y2 + z
(vi) x² - y3 – 28
N
(iii) p-q-1
(vi) pt + q* -r*
o​

Answer 1

Answer:

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