Factorise it. 50 Points.
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Step-by-step explanation:
a3 - b3 = (a - b)3 + 3ab(a - b)
a3 - b3 = (a - b)[(a - b)2 + 3ab]
a3 - b3 = (a - b)[a2 - 2ab + b2 + 3ab]
a3 - b3 = (a - b)(a2 + ab + b2)
Therefore, the formula for (a3 - b3) is
a3 - b3 = (a - b)(a2 + ab + b2)
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Answer:
a3 – b3 = (a – b) (a2 + ab + b2 ). 9. a3 + b3 = (a + b) (a2 - ab + b2 ).
Step-by-step explanation:
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