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Question
Simplify:
x4 − 6x3 + 2x − 7 + 7x3 − x + 5x2 + 2 − x4
Sum
Solution
x4 − 6x3 + 2x − 7 + 7x3 − x + 5x2 + 2 − x4
Rearranging and collectingthe like terms
= (1-1)x4 +(− 6+7)x3 + 5x2 +(2-1)x-7+ 2
= 0 + x3 + 5x2 +x-5
= x3 + 5x2 +x-5
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