Question

10x - 2y - 3
Example 6: Simplify: 17x2 - 15x + 7 - (2x2 + 5x + 10).
Solution: We have, 17x2 - 15x+7- (2x2 + 5x + 10)
= 17x2 - 15x + 7 - 2x2 - 5x - 10
= 17x2 - 2x2 - 15x -5x + 7-10
= 15x2 - 20x - 3
EXERCISE 12.2
1. Add.
(i) 7a2 + 5b2-4c, -8a2-5b2-702,3a2
(11) 5x + x+2,-77-4x+3,67-1-1
232​

Answer 1

Answer:

10x - 2y - 3

Example 6: Simplify: 17x2 - 15x + 7 - (2x2 + 5x + 10).

Solution: We have, 17x2 - 15x+7- (2x2 + 5x + 10)

= 17x2 - 15x + 7 - 2x2 - 5x - 10

= 17x2 - 2x2 - 15x -5x + 7-10

= 15x2 - 20x - 3

EXERCISE 12.2

1. Add.

(i) 7a2 + 5b2-4c, -8a2-5b2-702,3a2

(11) 5x + x+2,-77-4x+3,67-1-1

232