1. 9w-w^3

2. 2a^2+1+3a

1. 9w-w^3

2. 2a^2+1+3a

Tutors, please sign in to answer this question.

Decatur, GA

First put the polynomial in standard form (descending order of exponents):

2a^2 + 3a + 1

now factor the first coefficient (2):

2 * 1

Put these factors inside parenthesis:

(2a )(a )

Now, factor the last term (1):

2a^2 + 3a + 1

now factor the first coefficient (2):

2 * 1

Put these factors inside parenthesis:

(2a )(a )

Now, factor the last term (1):

1 * 1

These factors will now go inside the parenthesis:

(2a 1)(a 1)

You will end up multiplying the factors, and adding them

together to get the single order term (3a), the resulting sum must equal that

factor. Since the single order term (3a) is positive, the factors, when added

together must be positive.

So, 2a * 1 = 2a, a * 1 = a, Adding the results together, 2a + a = 3a

So, Both factors must be positive:

(2a + 1)(a + 1) = 2a^2 + 2a + a + 1,

combining like terms:

2a^2 + 3a + 1

Willowbrook, IL

The second one can be factored using quadratic formula or, if you do not know one, by a simple trick:

2a^{2}+3a+1=2a^{2}+2a+a+1=(2a^{2}+2a)+(a+1)=2a*(a+1)+(a+1)=**(a+1)*(2a+1)**

The first one can be easily factored by first taking w out as a common factor.

9w-w^{3}=(9-w^{2})*w;

Now 9-w^{2} can be factored even further by using a^{2}-b^{2}=(a+b)*(a-b) identity.

9-w^{2}=3^{2}-w^{2}=(3+w)*(3-w);

So your final answer for the first one is:

Foley, AL

To factor the 1st one, you should find the Greatest Common Factor or GCF. You can use a factor tree if you are used to finding the GCF that way. So,

9w - w^3

/ \ / \

9 w w^2 w

/ \ | / \ |

3 3 w w w w

A common factor will be

w

so divide each term by W:

9w /w = 9, and w^3/ w = w^2

You will be making a distribution problem:

w(9 - w^2) = w(3 +w)(3-w)

Timothy R.

Top Mathematics and Physics Tutor | Flexible

Avenel, NJ

4.8
(137 ratings)

Wesley L.

Premier MIT Math Tutor and SHSAT/SAT/ACT Specialist

New York, NY

5.0
(229 ratings)

Kevin T.

A Laid Back Tutor who Specializes in Math, Science, and Test Prep

Caldwell, NJ

4.8
(60 ratings)

- Algebra 1 3937
- Factoring 409
- Polynomials 328
- Quadratic Polynomials 8
- Factoring By Grouping 19
- Factorization 22
- Algebra 4902
- Factoring Trinomials 70
- Factor 59
- Math 9360

## Comments