Question

Simplify the expressions :
  if (x=3, a= -1, b=-2 )    a) 3x-5-x+9  ; b) 2-8x+4x+4
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Answer 1

Answer:

a)10  b)-6

Step-by-step explanation:

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

=9-8+9

=18-8

=10

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

=2-24+12+4

=-24+18

=-6

Answer 2

x=3, a= -1, b=-2

3x-5-x+9

3×3-5-3+9 according to BODMAS rule

9-5-3+9

9-5-12

-8

2-8x+4x+4

2-8×3+4×3+4 according to BODMAS rule

2-24+12+4

2-40

-38

up answer is wrong we have to do according to BODMAS rule