x²-y/ax-bx+ay-by=?

ax-bx+ay-by
=(ax+ay)-(bx+by)
=a(x+y)-b(x+y)
=(a-b)(x+y)
Original formula = (x + y) (X-Y) / (a-b) (x + y)
=(x-y)/(a-b)

RELATED INFORMATIONS

1. (ax+by)²+(ay-bx)²
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7. Given that the solution of the system of equations {ax by = 4, BX + ay = 5 is {x = 2, y = 1, then a + B = ()
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10. ax+ay-bx-by=(ax+ay)-( ）=（）（）
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