four

Group b

The root sign of 1.( 1)300 is the square root of 8 of 45 and 6.

2.-2x+6 (- 1≤x≤7)

3.( 1) 3/2 radical 2bc square (A < 0, B ≥ 0, C ≤ 0)

(2) The 7th power of t is 10t (s > 0, t > 0).

4.3% 4ab radical 3ab (a ≥ 0, b > 0)

15 page

Step 5 count down

6( 1) 3c (a >0，b≠0.c>0)

(2) the number of b elements a-B.

7.X = 10+2 roots 15.

8.A.

9.C

10. 12

I am tired of playing. Pick me.