Question

if x+y= 12 and xy =14 then the value of x² +y²+78
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Answer 1

Answer:

Hope it would help you

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Answer 2

Answer:

we know that,

${x}^{2} + {y}^{2} = {(x + y)}^{2} - 2xy$

have to find out : x² +y²+78

${x}^{2} + {y}^{2} + 78$

$⟹ {(x + y)}^{2} - 2xy + 78$

$⟹{12}^{2} +2. 14 + 78$

$⟹144 - 28 + 78$

$⟹194$