Arational number subtracted by a rational number equals?

You still get a rational number.

The sum/subtraction between rational numbers is defined as follows:

The expression is the sum/difference between the products of integers, and so is still an integer. This means that

is still a ratio between integers, and thus a rational.

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.