Question

2x ( 3x + 4x - 5 ) + 7 and find its value for x = 1/2 and x = 0

Answer 1

Answer:

i) 4

ii) 0

Step-by-step explanation:

2x(7x - 5) + 7

14x - 10 + 7

14x - 3

i) Substituting x as 1/2

14(1/2) - 3

7 - 3

4

ii) Substituting x as 0

14(0) - 3

0 - 3

0

Answer 2

Answer:

2x(3x+4x-5)+7

2x(7x-5)+7

14x2-10x+7

on substituting x=1/2

14*1/2*1/2-10*1/2+7

7/2-5+7

7/2-2

7-4/2

3/4

on substituting x=0

14*0*0-10*0+7

0-0+7

7