Question discussion

If a + b = 5 and ab = 6, what is the value of a³ + b³?

1652Medium DSSSB TGT Computer Science 0 replies

If a + b = 5 and ab = 6, what is the value of a³ + b³?

  • A30
  • B65
  • C35
  • D55
Correct answer: C

Explanation

a³ + b³ = (a + b)³ − 3ab(a + b) = 125 − 90 = 35.

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