If a-b=4 and ab=45 find the value of a^3-b^3
Answers
Answered by
118
a³ - b³ = (a - b)³ +3ab (a - b)
here,
(a - b ) = 4
ab = 45
so,
a³ - b³ = (4)³ + 3×45 × 4
= 64 + 540
= 604
hence,
a³ - b³ = 604
here,
(a - b ) = 4
ab = 45
so,
a³ - b³ = (4)³ + 3×45 × 4
= 64 + 540
= 604
hence,
a³ - b³ = 604
Answered by
45
a³ - b³ = (a - b)³ +3ab (a - b)
Given :-
(a - b ) = 4
ab = 45
a³ - b³ = (4)³ + 3 ×45 × 4
= 64 + 540
= 604
a³ - b³ = 604
Given :-
(a - b ) = 4
ab = 45
a³ - b³ = (4)³ + 3 ×45 × 4
= 64 + 540
= 604
a³ - b³ = 604
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