a+b=10 3/7 of ab =9 find a cube + b cube
Answers
Answered by
1
a+b=10
ab=21
(a-b)^2=(a+b)^2-4ab
=100-4(21)
=100-84=16
(a-b)=4
a+b+a-b=2a=14
a=7
b=3
a^3+b^3= 343+27= 370
ab=21
(a-b)^2=(a+b)^2-4ab
=100-4(21)
=100-84=16
(a-b)=4
a+b+a-b=2a=14
a=7
b=3
a^3+b^3= 343+27= 370
Similar questions