Question

if a³+b³=28,a+b=4 find the value of ab
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Answer 1

Answer:

acube +bcube

=(a+b)(a square +b squares −ab)

(a+b) square =(a square +b square +2ab) or(a+b) square −3ab=(a square +b square −ab)

a cube +b cube =(a+b)((a+b) square −3ab))=(11)(11

square −3×28)=407

Hence, a cube +b cube

=407.

Step-by-step explanation:

hope it's help it dear

Answer 2

Step-by-step explanation:

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