Question

Find the value of (x2+y2) if xy=15 and x - y=6.
Thabks to anyone who answers this correctly pls help me

Answer 1

Answer: (+6)

Step-by-step explanation:

using formula- (a²+b²)= (a-b)²+2ab

  sum=   (x²+y²)

          = (x-y)²+2xy

         putting the value,x-y=6 and xy= -15

         = (6)²+ 2×(-15)

        = 36 + (-30)

        =36-30

        = 6 ans

Answer 2

Answer:

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Step-by-step explanation:

We know that (x-y)²=x²+y²-2xy

Given : xy = 15 and x - y = 6

By substituting the values, we get

(x-y)²=x²+y²-2xy

(6)²=x²+y²-2(15)

36=x²+y²-30

x²+y² = 36+30

x²+y² = 66