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CBSE Class 9 Answered

If x+y=8 and xy =15, then x²+y²
Asked by sandeepjoe750 | 22 Feb, 2020, 06:58: PM
answered-by-expert Expert Answer
If x+y=8 and xy =15, then x²+y²
(x+y)2 = x²+y²+2xy
82=x²+y²+2(15)
64-30=x²+y²
x²+y²=34
Answered by Arun | 22 Feb, 2020, 11:00: PM

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