The sum of roots of a quadratic equation is 9 and the sum of roots of their cube is 189. find the equation
Answers
Answered by
2
Answer:
Step-by-step explanation:
a^3+b^3=189,a+b=9
729=189+3ab(9)
540=27ab
20=ab
(a-b)^2=81-80
a-b=1.... eq 1
a+b=9.. eq2
sum the equation
2a=10
a=5
b=4
Answered by
1
Answer:
41
Step-by-step explanation:
x+y=9
x*x*x*+y*y*y=189
consider values=1+8,2+7,6+3,4+5
The values are 4 & 5
4×4+5×5
=16+25
=41
Hope it helpful.......
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