Question

36. Simplify :
(i) 9 - {x - 4(x – 3) +8}
(iii) 3(a - 2b)-2 (b-3a) + b
(ii) 1- {2 - x (5 – x)+5}
(iv) 2 (3a - 5b + c) – 3 (2a – b-c)​

Answer 1

Answer:

(i) -11+3x

(ii) 9a-7b

(iii) -6+5x-x²

(iv) -7b+5c

Step-by-step explanation:

(i) 9-{x-4(x-3)+8}

= 9-{x-4x+12+8}

= 9-{-3x+20}

= 9+3x-20

= -11x+3x

(ii) 3(a-2b)-2(b-3a)+b

= 3a-6b-2b+6a+b

= 3a+6a-6b-2b+b

= 9a-8b+b

= 9a-7b (Answer)

(iii) 1-{2-x(5-x)+5}

= 1-{2-5x+x²+5}

= 1-{7-5x+x²}

= 1-7+5x-x²

= -6+5x-x²(Answer)

(iv) 2(3a-5b+c)-3(2a-b-c)

= 6a-10b+2c-6a+3b+3c

= 6a-6a-10b+3b+2c+3c

= -7b+5c(Answer)