Factorise x ^ 3 + 3 x ^ 2 + 3 x - 7 _________??????
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Answered by
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Answer:
(x-1) (x^2 + 4x + 7)
Step-by-step explanation:
x ^ 3 + 3 x ^ 2 + 3 x - 7
= x^3 + 4x^2 + 7x - 1x^2 - 4x - 7
= x( x^2 + 4x + 7) - 1 (x^2 + 4x + 7)
= (x-1) (x^2 + 4x + 7)
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