Question

Choose two trinomials from the list below to factor. Using complete sentences, explain how to factor each one. Be sure that the final factorization (or "answer") is a part of your explanation.


2x2 + 13x + 15
2x2 + 27x + 13
5x2 − 2x − 7
10x2 − 7x − 3
8x2 − 11x + 3

Answer 1

Do you know how to factor any of these?

Answer 2

nope

Answer 3

@Luigi0210

Answer 4

Well let's try the third one. 5x^2-2x-7
What multiples to 7?

Answer 5

7 times 1 @Luigi0210

Answer 6

Good, so we have this much:
(__x_7)(__x_1)
Now, since it's negative 7, that means that there is a + and - sign somewhere, can you find where they go in each?

Answer 7

(_x+7) (_x-7) @Luigi0210

Answer 8

x-1*

Answer 9

Good, so now we know that 5*1 equals 5, so now place the 5 and 1 in there.