If (a+b) = 11 and ab = 21, the value of a cube + b cube
Answers
Answered by
1
a+b=11
a = 11-b
Substituting @ in ab = 21
(11-b)b = 21
11b-bsquare = 21
bsq-11b+21=0
b = [11+√(121-4*1*21)]/2
b= 8.54
a= 11-b
=2.46
All the best.. go on learning new things!!!
Similar questions