1. 2x(3x-4)
2. (9-m)(4m)
Correct the mistakes in the following questions.
1. 2x+3x(2次方)+x-x(2次方)
=3x+x(2次方)
=4X(3次方)
2. 2分之8x+4-(3-2)
=4x+4-3x-2
=x+2
3. 2分之5(a-1)-3分之4(a+1)
=15(a-1)-8(a+1)
=15a-15-8(a+1)
=7a-23
更新1:
For each expression below,each letter repressents a distinct number from 0 to 9.Try to find out the value of each of them. 1. AA X AB -------- ACB 2. AB - BA ---------- BC