S8 68. IfA = 3x* -4x+ 1, B = 5x + 3x - 8 and C = 4e - 7x + 3, then find: ) (A +B) - C (ii) B+C - A (ii) A+ B +C
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Given :
- A = 3x² - 4x + 1
- B = 5x² + 3x - 8
- C = 4x² - 7x + 3
To find:
- (A + B) - C
Solution :
A + B = 3x² - 4x + 1 + 5x² + 3x - 8
= 3x²+ 5x² - 4x + 3x - 8 + 1
= 8x² - x - 7
(A + B) - C = 8x² - x - 7 - (4x² - 7x + 3)
= 8x² - x - 7 - 4x² + 7x - 3
= 4x² + 6x - 10
hope it helps :D
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