(x-2)(x+2)怎么算

x^2-x-60怎么算x^2-x-6 (x+2)(x+3)-(x+6)(x-1) 怎么算? (x-3)/(x^2+3x+2)×(x^2)/(x^2-4x+3)怎么算？ (x-1)(x-2)(x-3)(x-4)-(x^2-5x)^2-10(x^2-5x)怎么算? (x+2)(4x-2)怎么算, 2^x=x^2怎么算 (x-2)(x+2)怎么算 2x+x=10 怎么算? 2x减x 怎么算 (x-9)(x+2)>0怎么算 x(x-2)＞0怎么算 这道题怎么算x²-2x x-2/x≤0怎么算? (x-2)(x²-3)怎么算 2x+30+x怎么算 x(x+2)=24怎么算 x-2/x²-4 怎么算 2x-10.3x怎么算