No "x" can not be repeated, a function has one x-element and one y-element
right-handThe triangles are similar if, the ratios of their sides are equal


On the left-hand side

and in the right-hand side, we have

The left-hand side equals the right-hand side; therefore, the triangles are similar.
Answer:
Yes, the students answer is reasonable.
Step-by-step explanation:
Answer to the first question
The best option is to multiply them together, there would be no value that is common between the two, (2m - 1)(2m + 5), and leave it in this form.
However, there is a second method.
Notice how between the two sits a difference of 6.
You can manipulate one of the fractions to render the same denominator and work from there.