please solve the all question with steps 5 to 20
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16x^2 +25y^2
(16x)^2+(25y)^2 +2.16.25
256 x^2 +625y^2 +800
(16x)^2+(25y)^2 +2.16.25
256 x^2 +625y^2 +800
aadee:
it is question 9th
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