X^4+X^2-2ax+1-a^2

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X^4+X^2-2ax+1-a^2
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X^4+X^2-2ax+1-a^2
X^4+X^2-2ax+1-a^2

X^4+X^2-2ax+1-a^2
x^4+x^2-2ax+1-a^2
=x^4+2x^2+1-(x^2+2ax+a^2)
=(x^2+1)^2-(x+a)^2
=(x^2+1+x+a)(x^2+1-x-a)

计算: 1.2x²·(-3x²) 2.(3x²)²·(-1/5xy²)
3.(-2x²y³)²·(xy)³ 4.(2a)²b四次方÷12a³b²
5.(-2/3a七次方b五次方)÷3/2a&s...

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计算: 1.2x²·(-3x²) 2.(3x²)²·(-1/5xy²)
3.(-2x²y³)²·(xy)³ 4.(2a)²b四次方÷12a³b²
5.(-2/3a七次方b五次方)÷3/2a²b五次方
6.(6/5a³x四次方-0.9x³)÷3/5ax³
7.17x²y³-8x³y³z÷8x²y²
8.(25³+15x³-20x)÷(-5x) 9.(2/3x-y)(2/3x+y)
10.(xy+1)(xy-1) 11.(2a-3a)(3b+2b)
12.(-2b-5)(2b-5) 13.(2a+5b)²
14.(4x-3y)² 15.(-2m-1)²
16.(-1.5a-2/3b²) 17.(3x-5)²·(2x+7)²
18.(x+y+1)(x+y-1) 19.(2x-y-3)²
20.5x²(x+1)(x-1)
因式分21. 25x²-16y² 22.(a-b)(x-y)-(b-a)(x+y) 23.a²-4ab+b² 24.x²-9x
25. 16x四次方-1 26. 2a(y-z)-6b(z-y)
27. P(a²+b²)-8(a²+b²) 28.12xyz-9x²y²
29.x²+12x+36 30.4x²-4x+1
31.12x³-3y² 32.0.49七十二次方-144
33.(2x+y)²-(x+2y)² 34.m²-14m+49
35.(m+n)²-4m(m+n)+4m² 36.3ax²-3ay²
37.x²-5x-6 38.y²-2y+12
39.x²-2x-8 40.x²+3x+2
41.(2a-b)²+8ab 42.(a-b)²+4ab
43(P-4)(P+1)+3P

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