Question

Consider ax + b and cx + d, two linear expressions.

a. Find values for a, b, c, and d, such that the expression (ax + b) - (cx + d) is a linear expression.

b. Find values for a, b, c, and d, such that the expression (ax + b) - (cx + d) is not a linear expression

Answer 1

ax+b-(cx+d)=

ax+b-cx+d=

x(a-c)+b-d