Question

3. If x = 5, find the value of :
(i) x2 + x + 3
(ii) 5 + 4x - x2
(ii) 9x2 - 7x​

Answer 1

x2 + x + 3

Step-by-step explanation:

if x = 5

then,

5*2 + 5 + 3

10 + 5+ 3

15+3

18 Answer

Answer 2

Step-by-step explanation:

i.e x=5.

1) x2+x+3

5(2)+5+3

10+8

18

2)5+4x-x2

5+4(5)-5(2)

5+20-10

5+10

15

3)9x2 - 7x

9(5)(2)-7(5)

90-35

55