if a-b=5 and ab=14,find the value of a^3-b^3
Answers
Answered by
7
a-b = 5
a= 5+b
5+b)b= 14
b² +7b-2b-14,=0
b(b+7)-2(b+7)
so= b= 2,-7 and b= -2 , 7
a³+b³= -335or 335 ans.
a= 5+b
5+b)b= 14
b² +7b-2b-14,=0
b(b+7)-2(b+7)
so= b= 2,-7 and b= -2 , 7
a³+b³= -335or 335 ans.
Answered by
3
(a-b)^3=125
a^3-b^3-3ab(a-b)=125
a^3-b^3-42(5)=125
a^3-b^3-210=125
a^3-b^3=335 Ans
Similar questions