How do I factor this expression: 3(x + 5)^3 + 2(x + 5)^2?

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In summary, a factor polynomial is a polynomial expression in which all terms can be factored into smaller expressions. There are different techniques to factor a polynomial, such as grouping, factoring by grouping, difference of squares, or using the quadratic formula. Finding the roots of a polynomial means finding the values that make the polynomial equal to zero. Not all polynomials can be factored, such as prime polynomials. Factoring polynomials is important because it helps solve equations, find roots, simplify expressions, and understand the behavior of polynomial functions. It is also a fundamental concept in algebra and is used in various fields of science and engineering.
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mathdad
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Precalculus by David Cohen, 3rd Edition
Chapter 1, Section 1.3.
Question 46a.

Factor the expression.

3(x + 5)^3 + 2(x + 5)^2

(x + 5)^2[3(x + 5) + 2]

(x + 5)^2[3x + 15 + 2]

(x + 5)^2[3x + 17]

Correct?
 
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  • #2
RTCNTC said:
Precalculus by David Cohen, 3rd Edition
Chapter 1, Section 1.3.
Question 46a.

Factor the expression.

3(x + 5)^3 + 2(x + 5)^2

(x + 5)^2[3(x + 5) + 2]

(x + 5)^2[3x + 15 + 2]

(x + 5)^2[3x + 17]

Correct?

yes
 
  • #3
Looks good to me. :D
 
  • #4
There are a few more factoring questions from section 1.3 that will be posted in the coming days as I travel from chapter to chapter and section to section in the precalculus textbook, 3rd edition by David Cohen.
 

What is a factor polynomial?

A factor polynomial is a polynomial expression in which all of the terms can be factored into smaller polynomial expressions.

How do you factor a polynomial?

To factor a polynomial, you can use techniques such as grouping, factoring by grouping, difference of squares, or using the quadratic formula.

What does it mean to find the roots of a polynomial?

Finding the roots of a polynomial means finding the values of the variables that make the polynomial equal to zero. These values are also known as the solutions or zeros of the polynomial.

Can all polynomials be factored?

No, not all polynomials can be factored. Some polynomials, such as prime polynomials, cannot be factored any further.

Why is factoring polynomials important?

Factoring polynomials is important because it helps us solve equations, find the roots of a polynomial, simplify expressions, and understand the behavior of a polynomial function. It is also a fundamental concept in algebra and is used in various fields of science and engineering.

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