1) (x(d+b)-y(d+b)) / (b(x-y))=((d+b)(x-y)) / (b(x-y))=(d+b) / b
2) (-x(d+b)+y(d+b)) / (b(x-y))=((d+b)(y-x)) / (b(x-y))=-(d+b) / b
/-дробь
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Answers & Comments
1) (x(d+b)-y(d+b)) / (b(x-y))=((d+b)(x-y)) / (b(x-y))=(d+b) / b
2) (-x(d+b)+y(d+b)) / (b(x-y))=((d+b)(y-x)) / (b(x-y))=-(d+b) / b
/-дробь