9(m+n)^2-24(m+n)+16求过程25x^n-10^n+1+x^n+2(x^2+9)^2-36x24(x-2)^2-9(x+1)^2(x-2y)^2-(x+2y)^2能帮的都帮一下吧,因式分解类型题不会啊、第二个是(x^2+9)^2-36^2
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![9(m+n)^2-24(m+n)+16求过程25x^n-10^n+1+x^n+2(x^2+9)^2-36x24(x-2)^2-9(x+1)^2(x-2y)^2-(x+2y)^2能帮的都帮一下吧,因式分解类型题不会啊、第二个是(x^2+9)^2-36^2](/uploads/image/z/7952729-41-9.jpg?t=9%28m%2Bn%29%5E2-24%28m%2Bn%29%2B16%E6%B1%82%E8%BF%87%E7%A8%8B25x%5En-10%5En%2B1%2Bx%5En%2B2%28x%5E2%2B9%29%5E2-36x24%28x-2%29%5E2-9%28x%2B1%29%5E2%EF%BC%88x-2y%EF%BC%89%5E2-%28x%2B2y%29%5E2%E8%83%BD%E5%B8%AE%E7%9A%84%E9%83%BD%E5%B8%AE%E4%B8%80%E4%B8%8B%E5%90%A7%2C%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E7%B1%BB%E5%9E%8B%E9%A2%98%E4%B8%8D%E4%BC%9A%E5%95%8A%E3%80%81%E7%AC%AC%E4%BA%8C%E4%B8%AA%E6%98%AF%28x%5E2%2B9%29%5E2-36%5E2)
9(m+n)^2-24(m+n)+16求过程25x^n-10^n+1+x^n+2(x^2+9)^2-36x24(x-2)^2-9(x+1)^2(x-2y)^2-(x+2y)^2能帮的都帮一下吧,因式分解类型题不会啊、第二个是(x^2+9)^2-36^2
9(m+n)^2-24(m+n)+16求过程
25x^n-10^n+1+x^n+2
(x^2+9)^2-36x2
4(x-2)^2-9(x+1)^2
(x-2y)^2-(x+2y)^2
能帮的都帮一下吧,因式分解类型题不会啊、
第二个是(x^2+9)^2-36^2
9(m+n)^2-24(m+n)+16求过程25x^n-10^n+1+x^n+2(x^2+9)^2-36x24(x-2)^2-9(x+1)^2(x-2y)^2-(x+2y)^2能帮的都帮一下吧,因式分解类型题不会啊、第二个是(x^2+9)^2-36^2
9(m+n)^2-24(m+n)+16
设m+n=A,
所以化为
9A^2-24A+16,
=(3A)^2-2(3A)(4)+4^2
(先把第一和第三两项化成平方的形式,然后看第二项是否符合和或者差的平方公式)
=(3A-4)^2
=(3m+3n-4)^2 (把m+n=A代回)
(x^2+9)^2-36^2
=(x^2+9+36)(x^2+9-36) (利用平方差公式)
=(x^2+45)(x^2-27)
=(x^2+45)(x^2-(3√3)^2) (可能你们不要求)
=(x^2+45)(x-3√3)(x+3√3)
4(x-2)^2-9(x+1)^2
=2^2(x-2)]^2-3^2(x+1)^2
=[2(x-2)]^2-[3(x+1)]^2
=[2x-4]^2-[3x+3]^2
=[2x-4-3x-3][2x-4+3x+3]
=(-x-7)(5x-1)
=-(x+7)(5x-1)
(x-2y)^2-(x+2y)^2
=(x-2y-x-2y)(x-2y+x+2y)
=-4y*2x
=-8xy