a+b=7,ab=45/4.find a^3+b^3
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This is a great question :- Here is your answer :-
a + b = 7
ab = 45/4
(a+b)^3 = a^3 + b^3 + 3ab(a+b)
a3 + b^3 = (a+b)^3 - 3ab(a+b)
Substitute :-
(7)^3 - (3*45/4) (7)
343 - (135/4) (7)
343 - 945/4
(1372 - 945) / 4
427 / 4
Answer :- 427 / 4
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