Question

7) If a+b=7 and ab=10 find the value of (a²+b²)
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Answer 1

Answer:

» a² + b² = 7² - 20

» a² + b² = 29

Answer 2

Answer:

If a × b = 10

Means, only two number can make 10 that is 5 and 2.

If a + b = 7

So, 2 + 5 = 7.

.°. ( a² + b² )

5² + 2²

25 + 4

29

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