Question

4. If a + b = 15 and ab = 56, find the value of (a + b)^​

Answer 1

(a + b)² = a² + b² + 2ab

( 15 )² = a² + b² + 2(56)

225 - 112 = a² + b ²

113 = a² + b²

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Answer 2

Answer:

answer is in the pic

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