21. (a+4b)-5 and ab--3 find the value of (a2 +16b2) – InterviewSolution

1.

21. (a+4b)-5 and ab--3 find the value of (a2 +16b2)

Answer»

Given : ab = -3

( a + 4b) = 5

sqauring both sides

(a + 4b)² = 5² = 25

a² + 16b² + 8ab = 25

a² + 16b² - 24 = 25

a² + 16b² = 49

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