Question

x+y / x²-y² ÷ x²- x y /(x-y )²
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Answer 1

Answer:

x²- x y

Step-by-step explanation:

x²- x y...........

Answer 2

Given equations are x² + y² + z² = 525xy + yz + zx = 50Per algebraic identity.(x + y + z )² = x² + y² + z² + 2xy + 2yz + 2zx(x + y + z )² = x² + y² + z² + 2(xy+yz+zx)= 525+2(50)= 625x+y+z = √625= ±25

After squareroot will be cancelled , the number become ±25.( x + y + z )² = x² + y² + z² + 2xy +2yz +2zx( ±25 )² = 525 + 2( 50 )625 = 525 + 100625 = 625L.H.S = R.H.S.So ,

the answer is ' ±25 '.