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Question
If A = 3x2 – 4x + 1, B = 5x2 + 3x – 8 and C = 4x2 – 7x + 3, then find:
A + B + C
Solution
Given, A = 3x2 – 4x + 1, B = 5x2 + 3x – 8 and C = 4x2 – 7x + 3
A + B + C = 3x2 – 4x + 1 + 5x2 + 3x – 8 + 4x2 – 7x + 3
On combining the like terms,
= 3x2 + 5x2 + 4x2 – 4x + 3x – 7x + 1 – 8 + 3
= 12x2 – 8x – 4
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