Question

if (a+b)=5 and a^2+b^2=40 then find the value of a^3+b^3.
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Answer 1

Answer:

(a+b)=5      a²+b²=40

a²+b²+2ab= 25

40+2ab=25

ab = -15/2

as

(a+b)³=a³+b³+3∗a∗b∗(a+b)

125= a³+b³+3*-15/2*5

125+225/2=a³+b³

a³+b³=237.5

Step-by-step explanation: