3(2x+1)(2x-1)-4[(3)/(2)x-3][(3)/(2)+3]

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/18 02:50:00

3(2x+1)(2x-1)-4[(3)/(2)x-3][(3)/(2)+3]
5(2x+5)2+(3x-4)(-3x-4)
(2x+y-z+5)(2x-y+z+5)
[(7)/(3)x+(3)/(2)y]2

3(2x+1)(2x-1)-4[(3)/(2)x-3][(3)/(2)+3]
=3(4X^2-1)-4(9/4x^2-9)
=12x^2-3-9x^2+36
=3x^2+33
5(2x+5)2+(3x-4)(-3x-4)
=20x+50-9x^2+16
=9x^2+20x+66
(2x+y-z+5)(2x-y+z+5)
同上,注意平方差公式应用.
[(7)/(3)x+(3)/(2)y]2

x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2) x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4) x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002 |x^2-3x-4|>x+1 1+x+x^2+x^3+.+x^99+x^100 (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 x^4-x^3-2x^2+3x-1 x^4+x^3+2x^2+x+1 (x-1)^3(x+1)（x-2）/(x+4)