(x-2)的二次方-(x+3)(x-3)=4x-1

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(x-2)的二次方-(x+3)(x-3)=4x-1(x-2)的二次方-(x+3)(x-3)=4x-1(x-2)的二次方-(x+3)(x-3)=4x-1解(x-2)²-(x+3)(x-3)=4

(x-2)的二次方-(x+3)(x-3)=4x-1
(x-2)的二次方-(x+3)(x-3)=4x-1

(x-2)的二次方-(x+3)(x-3)=4x-1

(x-2)²-(x+3)(x-3)=4x-1
x²-4x+4-(x²-9)-4x+1=0
(x²-x²)+(-4x-4x)+(4+9+1)=0
-8x=-14
x=7/4