Question

if x _y = 9 and xy = 11 find the value of x +y ²​

Answer 1

Answer♡

125

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Answer 2

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■ x-y = 9 and xy= 11

( x+y)^2

= (x -y)^2 + 4xy { we know,( a+b)^2}

= 9^2 + 4×11 {=( a-b)^2+ 4ab}

= 81 + 44 = 125. ( Ans. )

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