Answers

2015-06-10T14:52:53+05:30
A+b=10
a^2+b^2=58
a^3+b^3=??
(a+b)^2=a^2+b^2+2ab
(10)^2=58+2ab    (by putting the values)
100=58+2ab
100-58=2ab
42=2ab
42/2=2ab
21=2ab
now we will find a^3+b^3
a^3 + b^3 = (a + b)^3 − 3ab(a + b)
a^3 + b^3 = (10)^3-3*21(10)         (by putting the values) 
a^3 + b^3 = 1000-63*10
a^3 + b^3 = 1000-630
a^3 + b^3 = 370


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