You can
put this solution on YOUR website!1). 2x^2+5x-12/15-10x
2). (a-b)(b-c)/(a^2-b^2)(a^2-b^2)
3). 3(x-2)^2/6(x-2)^2
4). x^2+3x-10/x^2-4x+4
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(x-2)^2 is a common factor in both numerator and denominator

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I don't know where to go from here. Hope I have helped