ax^4-9ay^4

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ax^4-9ay^4ax^4-9ay^4ax^4-9ay^4ax^4-9ay^4=a(x^4-9y^4)=a[(x^2)^2-(3y^2)^2]=a(x^2+3y^2)(x^2-3y^2)=a(x^2

ax^4-9ay^4
ax^4-9ay^4

ax^4-9ay^4
ax^4-9ay^4
=a(x^4-9y^4)
=a[(x^2)^2-(3y^2)^2]
=a(x^2+3y^2)(x^2-3y^2)
=a(x^2+3y^2)(x+√3y)(x-√3y) .

36m??n??-(9m??+n??)??=(6mn)??-(9m??+n??)??【利用平方差公式】=(6mn-9m??-n??)(6mn+9m??+n??)=-(9m??+n??-6mn)(9m??+6mn+n??)=-(3m-n)??(3m+n)??

ax^4-9ay^4 2ax^2-2ay^4, 因式分解:四分之一ax^2-ay^21/4ax^2-ay^2快噢 2ax^2-4axy+2ay^2-8a 分解因式:2ax^2-4axy+2ay^2 3ax^2-3ay^4分解因式分解因式2ax+4bx-ay-2by (1)x²y-2xy+y (2)-(x-1）²+9 (3)2ax²+4axy+2ay² （4）ay²+ay+1/4a 2aX^4-10ax^2y^2+ay^4 因式分解因式分解；8ax²-4ax+1/2a-2ay² 因式分解；8ax^2-4ax+1/2a-2ay^2 3ax²-3ay² 分解因式用的什么法第二个是 3ay⁴ 4次方 2x+4y=20 ax+ay=1 2x-y=5 bx+ay=6 因式分解题：x²-9x1：x²-9x2：x²-93:9-x²4：ax-ay 因式分解填空：4ax²-ay²=?,mx²-my²=?,x²-9y²=? 6ax^2-9a^2 xy+2xy-3ay^2x^3-5x+4 分解因式3ax²-3ay²ax²-4ay² 2a³b-4a²b²+2a²b³ 因式分解（1）2ax-10ay+5by-bx（2）x²+xy+bx+ax+by+ay（1）x²+3x-4