乘法公式(-1+4x)(4x-1)2.(m-3)(-m+3)3.(-3a+b(-3a-b)4.(3a-2b)(-3a-2b)(-3a-2b)5.(x-2)²-(x+1)(x-1)6.(2m-n)(n-2n)-(n-m)²

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乘法公式(-1+4x)(4x-1)2.(m-3)(-m+3)3.(-3a+b(-3a-b)4.(3a-2b)(-3a-2b)(-3a-2b)5.(x-2)²-(x+1)(x-1)6.(2m-n)(n-2n)-(n-m)²
乘法公式

(-1+4x)(4x-1)2.(m-3)(-m+3)3.(-3a+b(-3a-b)4.(3a-2b)(-3a-2b)(-3a-2b)

5.(x-2)²-(x+1)(x-1)6.(2m-n)(n-2n)-(n-m)²

乘法公式(-1+4x)(4x-1)2.(m-3)(-m+3)3.(-3a+b(-3a-b)4.(3a-2b)(-3a-2b)(-3a-2b)5.(x-2)²-(x+1)(x-1)6.(2m-n)(n-2n)-(n-m)²
(-1+4x)(4x-1)
=(4x-1)²
=16x²-8x+1

2.(m-3)(-m+3)
=-(m-3)²
=-(m²-6m+9)
=-m²+6m-9


3.(-3a+b(-3a-b)
=(3a-b)(3a+b)
=9a²-b²

4.(3a-2b)(-3a-2b)
=-(3a-2b)(3a+2b)
=-9a²+4b²

5.(x-2)²-(x+1)(x-1)
=x²-4x+4-x²+1
=5-4x

6.(2m-n)(n-2m)-(n-m)²
=-(2m-n)²-(m-n)²
=-4m²+4mn-n²-m²+2mn-n²
=-5m²+6mn-2n²