Question

Which of the following is equivalent to (c – 4)(c – 4)?

Answer 1

For this case we must find an expression equivalent to
`(c - 4) (c - 4)`, for this, we must apply distributive property, which by definition establishes:

`(a + b) (c + d) = ac + ad + bc + bd`

So:

`(c - 4) (c - 4) = c ^ 2-4c-4c + (- 4) (- 4)`

taking into account that
`- * - = +`

`(c - 4) (c - 4) = c ^ 2-8c + 16`

Answer:

Option C