Question

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Answer 1

Step-by-step explanation:

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Answer 2

Answer :

1. If a = 2 , b = 3 find the value of the following algebraic expressions .

a) 3a + 2b

= 3 × 2 + 2 × 3

= 6 + 6

= 12

b) 2a - b

= 2 × 2 - 3

= 4 - 3

= 1

2. If x = - 1 , y = 2 , z = -3 find the value of ,

a) x + y + z

= - 1 + 2 -3

= 0

b) 2x - 3y + 6z

= 2 × - 1 - 3 × 2 + 6 × - 3

= - 2 - 6 - 18

= - 8 - 18

= - 26

3. If p = - 3 , q = 0 , r = 2 find the value of

a ) p + q + r + 1

= - 3 + 0 + 2 + 1

= - 1 + 1

= 0

b) 2pq + 3qr - 4pr

= 2(-3)(0) + 3(0)(2) - 4(-3)(0)

= 0 + 0 - 0

= 0