Question

Simplify these expressions and find their values if x = 3
(ii) 2 - 8x + 4x + 4
3x - 5- X + 9​

Answer 1

First part

2 - 8x + 4x + 4

2 - (8×3) + (4×3) + 4

2- 24 + 12 + 4

18 - 24

Ans = -6

Second part

9 - 5 - 3 + 9

10

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Answer 2

Answer:

1) 2 - 8x + 4x + 4

value of. X = 3

2 - 8 (3) + 4 (3) + 4

2 - 24 + 12 + 4

18 - 24

= -6

2) 3x - 5 - X + 9

3 (3) - 5 - (3) + 9

9 - 5 - 3 + 9

18 - 8

= 10