作业帮（x的2方+1）(x+1)(x-1)=要过程(2a+1/2)(2a-1/2)(4a的2方+1/4）=（x+3)(x-3)-2(2-x)(2+x)=(2x+3y)(3x-2y)-(x-2y)(x+2y)=(a的2方-4）（a的2方-5）+（3a+5)(3a-5）=[(2a-1)(2a+1)+(a+2)(a-2)-4a的2方]（a的2方+5）=
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/04 07:49:57
![（x的2方+1）(x+1)(x-1)=要过程(2a+1/2)(2a-1/2)(4a的2方+1/4）=（x+3)(x-3)-2(2-x)(2+x)=(2x+3y)(3x-2y)-(x-2y)(x+2y)=(a的2方-4）（a的2方-5）+（3a+5)(3a-5）=[(2a-1)(2a+1)+(a+2)(a-2)-4a的2方]（a的2方+5）=](/uploads/image/z/2760560-8-0.jpg?t=%EF%BC%88x%E7%9A%842%E6%96%B9%2B1%EF%BC%89%28x%2B1%29%28x-1%29%3D%E8%A6%81%E8%BF%87%E7%A8%8B%282a%2B1%2F2%29%282a-1%2F2%29%284a%E7%9A%842%E6%96%B9%2B1%2F4%EF%BC%89%3D%EF%BC%88x%2B3%29%28x-3%29-2%282-x%29%282%2Bx%29%3D%282x%2B3y%29%283x-2y%29-%28x-2y%29%28x%2B2y%29%3D%28a%E7%9A%842%E6%96%B9-4%EF%BC%89%EF%BC%88a%E7%9A%842%E6%96%B9-5%EF%BC%89%2B%EF%BC%883a%2B5%29%283a-5%EF%BC%89%3D%5B%282a-1%29%282a%2B1%29%2B%28a%2B2%29%28a-2%29-4a%E7%9A%842%E6%96%B9%5D%EF%BC%88a%E7%9A%842%E6%96%B9%2B5%EF%BC%89%3D)
（x的2方+1）(x+1)(x-1)=要过程(2a+1/2)(2a-1/2)(4a的2方+1/4）=（x+3)(x-3)-2(2-x)(2+x)=(2x+3y)(3x-2y)-(x-2y)(x+2y)=(a的2方-4）（a的2方-5）+（3a+5)(3a-5）=[(2a-1)(2a+1)+(a+2)(a-2)-4a的2方]（a的2方+5）=
（x的2方+1）(x+1)(x-1)=要过程
(2a+1/2)(2a-1/2)(4a的2方+1/4）=
（x+3)(x-3)-2(2-x)(2+x)=
(2x+3y)(3x-2y)-(x-2y)(x+2y)=
(a的2方-4）（a的2方-5）+（3a+5)(3a-5）=
[(2a-1)(2a+1)+(a+2)(a-2)-4a的2方]（a的2方+5）=
（x的2方+1）(x+1)(x-1)=要过程(2a+1/2)(2a-1/2)(4a的2方+1/4）=（x+3)(x-3)-2(2-x)(2+x)=(2x+3y)(3x-2y)-(x-2y)(x+2y)=(a的2方-4）（a的2方-5）+（3a+5)(3a-5）=[(2a-1)(2a+1)+(a+2)(a-2)-4a的2方]（a的2方+5）=
（x^2+1）(x+1)(x-1)
=(x^2+1)(x^2-1)
=x^4-1
(2a+1/2)(2a-1/2)(4a^2+1/4）
=(4a^2-1/4)(4a^2+1/4)
=16a^4-1/16
（x+3)(x-3)-2(2-x)(2+x)
=x^2-9-2(4-x^2)
=x^2-9-8+2x^2
=3x^2-17
(2x+3y)(3x-2y)-(x-2y)(x+2y)
=6x^2+5xy-6y^2-x^2+4y^2
=5x^2+5xy-2y^2
(a^2-4）（a^2-5）+（3a+5)(3a-5）
=a^4-9a^2+20+9a^2-25
=a^4-5
[(2a-1)(2a+1)+(a+2)(a-2)-4a^2]（a^2+5)
=(4a^2-1+a^2-4-4a^2)(a^2+5)
=(a^2-5)(a^2+5)
=a^4-25