x - y = a + b
ax + by = a^2-b^2
find x and y by cross multiplication method.
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Answer:
abx+a2y=2a2babx+a2y=2a2b
abx−b2y=a2b−b3abx−b2y=a2b−b3
Subtract them.
(a2+b2)y=(a2+b2)b(a2+b2)y=(a2+b2)b
⟹y=b
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