Question

(2 - y)2 – 6(x - y) + 5​

Answer 1

Answer:

-6x +4y+9 is the answer of this ques

Answer 2

Answer:

Although you may wish to solve the system of equations, this is a far more bothersome task than simply noticing the difference of squares pattern, which states that x2−y2=(x+y)(x−y) .

x2−y2=30

(x+y)(x−y)=30

We see an x−y , but it looks like we can’t solve for its value without knowing x+y . But we do - it was given in the problem statement as 6 ! Making the substitution, we see:

6(x−y)=30

x−y=5

Therefore, x−y is equal to 5.

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