Question 2: I don't understand your question. See if there is any mistake in copying. Your example is: 3X+2= 1 1 (variable). Looking for 3x+2, the answer is 29.

Question 3: You can get x= 1 from 52x+1 =/25, and then multiply this (X-2) 2005+X to get the value of1.

Question 4: = x 9+x 36+4 (x 6)

Question 5: 3375

Question 6: x=-0.2

Question 7: x=9/2, which is 4.5.

Question 8: y=2 and x=4, so the answer is 2.

Question 9: The simplified 22y-23, the answer is -67.

Calculation problem (1): 9a 2- 12a+4

(2):(x+y)^2- 16

(3):( 1-9a^2)/4b^2

⑷4x^2+y^2+9z^2+4xy- 12xz-6yz

(5): 27* 10^ 18

Please come and bother me more often in the future (* _ _ *) Hee hee ... Don't make mistakes in the future. Multiplying by * will be less confusing.