Question

If a+b=13 and ab=25,find the value of
a cube + b cube​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

from a2+b2

(a+b)2

a2+b2+2ab=(a+b)2

a2+b2+2*25=(13)2

a2+b2+50=169

a2+b2=169-50

a2+b2=119

then,

a3+b3= (a+b)(a2-ab+b2)

a3+b3=13*(a2+b2-ab)

a3+b3=13*(119-25)

a3+b3=13*94

a3+b3=1222