x2 - 25 4 Simplify: х - 5 100 х — 20— х — 5

Elementary Algebra
17th Edition
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:Lynn Marecek, MaryAnne Anthony-Smith
Chapter7: Factoring
Section7.2: Factor Quadratic Trinomials With Leading Coefficient 1
Problem 132E: How do you determine whether to use plus or minus signs in the binomial factors of a trinomial of...
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Question
16
Simplify:
2x2 + 8x
We will begin by factoring the numerator and denominator. Then we will remove any factors common to the numerator and denominator.
We need to make sure that the numerator and denominator have no common factors other than 1. If that is the case, then the rational expression is simplified.
x²
16
sxA5(x – 4)
Remove the binomial factor x + 4 that is common to the numerator and denominator.
%D
2x2 + 8x
2x(x+4)
х — 4
2x
х — 4
This rational expression does not simplify further.
%D
2x
x2
Simplify:
25
4
X - 5
100
х — 20 —
х — 5
Transcribed Image Text:16 Simplify: 2x2 + 8x We will begin by factoring the numerator and denominator. Then we will remove any factors common to the numerator and denominator. We need to make sure that the numerator and denominator have no common factors other than 1. If that is the case, then the rational expression is simplified. x² 16 sxA5(x – 4) Remove the binomial factor x + 4 that is common to the numerator and denominator. %D 2x2 + 8x 2x(x+4) х — 4 2x х — 4 This rational expression does not simplify further. %D 2x x2 Simplify: 25 4 X - 5 100 х — 20 — х — 5
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