Question

13. Simplify the following algebraic expressions.
(1) 3x2 + 3(x2 + 5)
(ii) (7x - 3) - 2(2x + 1) - 3(x - 2)
(iii) 3x + 3 - [3x + 3 - {3x + 3 - (3x +3 - 3x - 3)}]

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Answer 1

Answer:

use bodmas rule

Step-by-step explanation:

1) 3×2+3 (2+5)

ans)3×2+3×7

6+21

27

2)7x−3−2(2x+1)−3(x−2)

Expand.

7x-3-(4x+2)-3(x-2)7x−3−(4x+2)−3(x−2)

Expand.

7x-3-(4x+2)-(3x-6)7x−3−(4x+2)−(3x−6)

Simplify brackets.

7x-3-4x-2-3x+67x−3−4x−2−3x+6

Collect like terms.

(7x-4x-3x)+(-3-2+6)(7x−4x−3x)+(−3−2+6)

Simplify.

1