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Question

Find 64x2+81y2+144xy48 when x=11 and y=43

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Solution

We have, 64x2+81y2+14xy

When x=11,y=43, then
=64(11)2+(81×169)+(14448×11×43)

=(64×121)+(9×16)+44

=7744+144+44

=7932

Hence, 64x2+81y2+14xy=7932 when x=11 and y=43


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