(2x+3)(3x-2) 计算
=6x²-4x+9x-6
=6x²+5x-6
(2x-3)的平方(2x+3)的平方
=[(2x-3)(2x+3)]²
=(4x²-9)²
=16x^4-72x²+81
2(m+1)的平方-(2m+1)(2m-1)
=2(m²+2m+1)-(4m²-1)
=2m²+4m+2-4m²+1
=-2m²+4m+3
4x的平方-(-2x+3)(-2x-3)
=4x²-[(-2x)²-3²]
=4x²-4x²+9
=9
(2x+3)(3x-2) 计算
=6x²-4x+9x-6
=6x²+5x-6
(2x-3)的平方(2x+3)的平方
=[(2x-3)(2x+3)]²
=(4x²-9)²
=16x^4-72x²+81
2(m+1)的平方-(2m+1)(2m-1)
=2(m²+2m+1)-(4m²-1)
=2m²+4m+2-4m²+1
=-2m²+4m+3
4x的平方-(-2x+3)(-2x-3)
=4x²-[(-2x)²-3²]
=4x²-4x²+9
=9