你可能感兴趣的试题
a(x+y)=ax+ay x2﹣4x+4=x(x﹣4)+4 10x2﹣5x=5x(2x﹣1) x2﹣16+3x=(x﹣4)(x+4)+3x
-(2x+5)=-2x+5 -(4x-2)=-2x+2 -a+b=-(a-b) 2-3x=-(3x+2)
X33、X34 X32、X34 X33、X35 X32、X35
3a+b=3ab 23x+4=27x -2(x-4)=-2x+4 -(-2+3x)=2-3x
2x+x=3x 2x+3y=5x
5x﹣2x=3x 5ab﹣5ba=0 4x2y﹣5xy2=﹣x2y 3x2+2x2=5x2
a (x + y) =a x + a y x2-4x+4=x(x-4)+4 10x2-5x=5x(2x-1) x2-16+3x=(x-4)(x+4)+3x
)2x(3x-2)=5x2-4x ( )(2y +3x)(3x-2y)=9x2-4y2 ( )(x+2) 2=x2+2x+4 ( )(x+2)(2x-1)=2x2+5x-2
a+2a=3a x4•x3=x12 ()﹣1=﹣ (x2)3=x5
如果2x=2y+1,那么x=y+1 如果2=5+3x,那么3x=5﹣2 如果x﹣3=y﹣3,那么x=y 如果﹣8x=4,那么x=﹣2
x2﹣9+6x=(x+3)(x﹣3)+6x (x+5)(x﹣2)=x2+3x﹣10 x2﹣8x+16=(x﹣4)2 6ab=2a•3b
(3x+1)(3x-1)=9x2-1 x2-2x+4=(x-2)2 a4-1=(a2+1)(a+1)(a-1) 9x2-1+3x=(3x+1)(3x-1)+3x
a(x+y)=ax+ay; x2-4x+4=x(x-4)+4; 10x2-5x=5x(2x-1); x2-16+3x=(x+4)(x-4)+3x
35厘米X35厘米 40厘米X35厘米 30厘米X35厘米 40厘米X40厘米