fastorise x³+3x²+3x-7
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Answer: (x + 1) (x² - 4x + 7)
Explanation:
x³ - 3x² + 3x + 7
= x³ + x² - 4x² - 4x + 7x + 7
= x²(x + 1) + -4x (x + 1) + 7 (x + 1)
= (x + 1) (x² - 4x + 7)
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