is a minus b is equal to 3 and a b is equal to 4 find a cube minus b cube solution
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Given:
a - b = 3
ab = 4
(a-b)^2 = a^2+ b^2 - 4ab = 9
a^3-b^3 = (a-b)(a^2+b^2+ab)
= (3)(9 + 4ab + ab)
= (3)(9 + 16 + 4)
a^3 - b^3 = 87 Ans.
ayush1968:
wrong ans
Instead of 4ab, take 2ab
Answer would be 63
ya right
thanku
Answered by
1
Step-by-step explanation:
the of a cube minus b cube is 63
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