The sum of two positive numbers is 4 and the sum of their cubes is 28. What is the product of the two numbers?
demon2001:
3 is the answer....
Answers
Answered by
3
hey Frnd.
feeling nice.
given,a+b=4 and a³+b³=28
a³+b³=(a+b) (a²+b²-ab)
=>28=(4) (a+b)²-3ab
=>7=16-3ab
=>-9=-3ab
ab=3 ans.
feeling nice.
given,a+b=4 and a³+b³=28
a³+b³=(a+b) (a²+b²-ab)
=>28=(4) (a+b)²-3ab
=>7=16-3ab
=>-9=-3ab
ab=3 ans.
Answered by
1
a+b=4
acube+bcube=28
If a=3 and b=1
3+1=4
3cube+ 1cube=28
3×1=3
ab=3
acube+bcube=28
If a=3 and b=1
3+1=4
3cube+ 1cube=28
3×1=3
ab=3
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