Question

The length of a side of an equailateral triangle is x-4.5. First express its perimeter as a sum. Next express its perimeter as a product. Explain why the two expressions are equivalent

Answer 1

(x-4.5)+(x-4.5)+(x-4.5)
3(x-4.5)
Those 2 expressions are equivalent because 3x is the same as x+x+x so (x-4.5)+(x-4.5)+(x-4.5) should be the same as 3(x-4.5)