初二因式分解题:1、(xˆ2 -5)ˆ2-16xˆ2.2、(xˆ2 +3x)ˆ2-(2x+6)ˆ2
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初二因式分解题:1、(xˆ2 -5)ˆ2-16xˆ2.2、(xˆ2 +3x)ˆ2-(2x+6)ˆ2
初二因式分解题:1、(xˆ2 -5)ˆ2-16xˆ2.2、(xˆ2 +3x)ˆ2-(2x+6)ˆ2
初二因式分解题:1、(xˆ2 -5)ˆ2-16xˆ2.2、(xˆ2 +3x)ˆ2-(2x+6)ˆ2
1、(xˆ2 -5)ˆ2-16xˆ2.
=(x^2-4x-5)(x^2+4x-5)
=(x-5)(x+1)(x+5)(x-1)
2、(xˆ2 +3x)ˆ2-(2x+6)ˆ2
=(x^2+3x+2x+6)(x^2+3x-2x-6)
=(x^2+5x+6)(x^2+x-6)
=(x+3)(x+2)(x+3)(x-2)
=(x+3)^2(x+2)(x-2)
1、(xˆ2 -5)ˆ2-16xˆ2
= (xˆ2 -5 - 4x )(xˆ2 -5 + 4x )
= (x -5)(x +1)(x+5)(x -1)
2、(xˆ2 +3x)ˆ2-(2x+6)ˆ2
= [xˆ2 +3x -(2x+6)][xˆ2 +3x + (2x+6)]
= (x^2 + x -6)(x^2 + 5x + 6)
= (x +3)^2(x -2)(x+2)