Question

Yadi x+y=9 or xy=18 to x2+y2 ka man gyat kijiy

Answer 1

Step-by-step explanation:

xy = 18, therefore x = 18/y

18/y + y = 9

18 + y^2 = 9y

On rearranging, we get

y^2 - 9y + 18 = 0

Solving the quadractic equation:

y^2 - 3y - 6y + 18 = 0

y(y-3) - 6(y-3) = 0

(y-6)(y-3) = 0

Therefore, y = 6 or y = 3

So if y = 6, x = 3

and if y = 3, x = 6

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