a *(2 ^ 3)*(3 ^ 2)= 24。

So a= 1/3.

That is, the algebraic expression is (1/3) x 3y 2.

Solution: Set this.

The first binomial is ax+b.

Replace it with the meaning of the question

a+b=2........( 1)

-a+b=4.......(2)

(1)+(2), 2b=6, so b=3.

Substitute (1) to get a=- 1.

therefore

This algebraic expression is -x+3, okay?