Q. 87 In the following exercises, fact... [FREE SOLUTION]

91影视

Elementary Algebra

Lynn Marecek, MaryAnne Anthony-Smith

$Math Studyset 91影视 Explanations$ Math

2nd Edition 路 1240 pages

ISBN: 9780998625713

Chapter 7: Q. 87 (page 832)

In the following exercises, factor each trinomial of the form $x^{2} + b x + c$
$a^{2} - 3 a - 28$

Short Answer

Expert verified

The factorization of $a^{2} - 3 a - 28$ is $(a + 4) (a - 7)$

Step by step solution

Step 1. Given information

given expression is $a^{2} - 3 a - 28$

Step 2. Find the last terms of the binomials

Factor out the expression:

Factors of -28	Sum of factors
4, (-7)	4 + (-7) = -3
2, (-14)	2 + (-14) = -12

Step 3. Factorization

Use $4$ and $- 7$ as the last terms of the binomials

$a^{2} - 3 a - 28 = (a + 4) (a - 7)$

Step 4. Check

$(a + 4) (a - 7) = a^{2} + 4 a - 7 a - 28 = a^{2} - 3 a - 28$

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91影视

In the following exercises, factor each trinomial of the form $x^{2} + b x + c$
$a^{2} - 3 a - 28$

Short Answer

Step by step solution

Step 1. Given information

Step 2. Find the last terms of the binomials

Step 3. Factorization

Step 4. Check

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91影视

In the following exercises, factor each trinomial of the formx2+bx+ca2-3a-28

Short Answer

Step by step solution

Step 1. Given information

Step 2. Find the last terms of the binomials

Step 3. Factorization

Step 4. Check

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Discrete Mathematics

Calculus

Geometry

Pure Maths

Mechanics Maths

Logic and Functions

Study anywhere. Anytime. Across all devices.

In the following exercises, factor each trinomial of the form $x^{2} + b x + c$
$a^{2} - 3 a - 28$