x^2-9x+8=

Or is it prime.

x^2-9x+8=

Or is it prime.

Tutors, please sign in to answer this question.

Middletown, CT

Hi again David;

x^{2}-9x+8

We can factor this.

For the FOIL...

FIRST must be (x)(x)=x^{2}

OUTER and INNER must add-up to -9x

LAST must be (8)(1) or (1)(8) or (4)(2) or (2)(4), and both numbers must be negative.

(x-8)(x-1)

FIRST...(x)(x)=x^{2}

OUTER...(x)(-1)=-1x=-x

INNER...(-8)(x)=-8x

LAST...(-8)(-1)=8

x^{2}-x-8x+8

x^{2}-9x+8

Amaan M.

Math/Economics Teacher

New York, NY

5.0
(70 ratings)

Jing X.

IVY-graduate specializing in SAT, ACT, Math and College App

Brooklyn, NY

4.9
(77 ratings)

Michael E.

H.S. Mathematics Tutor (Certified NJ Teacher)

Saddle Brook, NJ

5.0
(131 ratings)

- Algebra 1 3929
- Math 9348
- Algebra 4900
- Math Help 5188
- Algebra Word Problem 2409
- Precalculus 1480
- Word Problem 4941
- Algebra 2 Question 500
- Algebra Help 952
- Geometry 1807