x^2-6x+9-y^2=(x-3)^2-y^2=(x-3+y)(x-3-y)
<span>10x-8xy-3xy = 10x - 11xy</span>
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50/(18+x)+8/(18-x)=3|*(18+x)*(18-x)
50(18-x)+8(18+x)=3(18+x)(18-x)
900-50x+144+8x=54+3x(18-x)
972+54x-54x-3x²=900-50x+144+8x
900-50x+144+8x-972-54x+54x+3x²=0
3x²-42x−1,728=0
D=(-b)²-4ac=42²-4*3*(-1728)=1764+20,736=22500
x(1)(2)=(-b±√D)/2*a
x(1)=(42+150)/6=192/6=32
x(2)=(42-150)/6=-108/6=-18
<span>3m(p-2q)-p+2q=(p-2q)(3m-1)</span>