Question

@PaulaLovesSchool13 Which of the following constants can be added to x2 - 10x to form a perfect square trinomial?

Answer 1

You can add 25 (B) to get a perfect square trinomial.

Since x^2 has no coefficient, there is an easy trick to figuring out how it works.

There must be some factors of the constant that add up to the middle number. If the constant is positive, the factors can be both positive or both negative (in this case, -5 and -5 would make -10). They are allowed to be negative because, when multiplied together, you get +25, therefore still adding it like the question asks.

If the constant is negative, you need to do a little more math because one factor will be positive and the other negative. For example, if the middle number were -3, the constant could be -10 because two of the factors, -5 and 2, add up to -3.

Answer 2

Source: https://answers.yahoo.com/question/index?qid=20110208072344AAsPZzq

Answer 3

Did that help Rosie?

Answer 4

Rosie to type you click the box that says "type your reply" :)

Answer 5

Thank you

Answer 6

sure!