你可能感兴趣的试题
(-a2)5 =-a10 (x+2)(x-1)=x2+x-2 (a-b)5÷(a-b)3= a 2-b2 -(a- )2= – a2+a –
[ 2 ,5] [ 2 ,9] [ 5 ,9] [ - 1 ,9]
10x2-2 10x2-x-2 10x2+4x-2 10x2-5x-2
2x+3y=5xy 3x﹣x=3 2x+3x=5x2 ﹣x2﹣x2=﹣2x2
-|-2|=-2 (a2)3=a5 2x2+3x2=5x2
(﹣2xy)2=﹣4x2y2 x6÷x3=x2 (x﹣y)2=x2﹣y2 2x+3x=5x2
4x+5 x2-4x-5 -4x-5 x2-4x+5
2(x+5)=23 2x+5=23 2x=23﹣5 2x﹣5=23
x≥1 且X.≠-2 x>1且x≠-2 x≠-2 .x≥1