If x2 + y2 = 25 and xy = 12 , find the value of each expression. (i) x + y (ii) x - y (iii) x4 + y4. ( Write only answers process no need to show)
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x²+y²=25.
xy = 12
The va.lue of 2(x + y)²+3(x - y)²
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