Question

If a+b=11 and ab=30 find a3+b3

Answer 1

Answer:

a+b=11

ab=30

we will use the formula (a+b)^3 = a^3 + b^3 +3ab (a+b)

substituting the values

(11)^3 = a^3+b^3 +3(30) (11)

(1331) = a^3+b^3 + 90 (11)

1331 = a^3+b^3 + 990

1331-990 = a^3+b^3

341 = a^3=b^3

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Answer 2

Answer:

Step-by-step explanation

5+6 = 11

5*6=30

Therefore 5(3) + 6(3) = 15+18=33