Answer :
To factor out the greatest common factor (GCF) from the polynomial [tex]\(7x^7 - 35x^6 + 56x^5\)[/tex], let's follow these steps:
1. Identify the coefficients:
- The coefficients in the polynomial are: 7, -35, and 56.
2. Find the greatest common factor of the coefficients:
- The coefficient factors are:
- 7: [tex]\(7\)[/tex]
- -35: [tex]\(7 \times -5\)[/tex]
- 56: [tex]\(7 \times 8\)[/tex]
- The greatest common factor of 7, -35, and 56 is 7.
3. Observe the variable terms:
- The variable terms are: [tex]\(x^7\)[/tex], [tex]\(x^6\)[/tex], and [tex]\(x^5\)[/tex].
- The greatest power of [tex]\(x\)[/tex] that is common to all these terms is [tex]\(x^5\)[/tex].
4. Determine the GCF of the entire expression:
- Combining the factors found, the greatest common factor of the polynomial is [tex]\(7x^5\)[/tex].
5. Factor out the GCF from each term of the polynomial:
- [tex]\(7x^7 \div 7x^5 = x^2\)[/tex]
- [tex]\(-35x^6 \div 7x^5 = -5x\)[/tex]
- [tex]\(56x^5 \div 7x^5 = 8\)[/tex]
6. Write the polynomial in factored form:
- After factoring out the GCF, the polynomial becomes:
[tex]\[
7x^5(x^2 - 5x + 8)
\][/tex]
Therefore, the correct factored form of the polynomial [tex]\(7x^7 - 35x^6 + 56x^5\)[/tex] is:
[tex]\[
7x^5(x^2 - 5x + 8)
\][/tex]
This matches option A: [tex]\(7x^7 - 35x^6 + 56x^5 = \boxed{7x^5(x^2 - 5x + 8)}\)[/tex].
1. Identify the coefficients:
- The coefficients in the polynomial are: 7, -35, and 56.
2. Find the greatest common factor of the coefficients:
- The coefficient factors are:
- 7: [tex]\(7\)[/tex]
- -35: [tex]\(7 \times -5\)[/tex]
- 56: [tex]\(7 \times 8\)[/tex]
- The greatest common factor of 7, -35, and 56 is 7.
3. Observe the variable terms:
- The variable terms are: [tex]\(x^7\)[/tex], [tex]\(x^6\)[/tex], and [tex]\(x^5\)[/tex].
- The greatest power of [tex]\(x\)[/tex] that is common to all these terms is [tex]\(x^5\)[/tex].
4. Determine the GCF of the entire expression:
- Combining the factors found, the greatest common factor of the polynomial is [tex]\(7x^5\)[/tex].
5. Factor out the GCF from each term of the polynomial:
- [tex]\(7x^7 \div 7x^5 = x^2\)[/tex]
- [tex]\(-35x^6 \div 7x^5 = -5x\)[/tex]
- [tex]\(56x^5 \div 7x^5 = 8\)[/tex]
6. Write the polynomial in factored form:
- After factoring out the GCF, the polynomial becomes:
[tex]\[
7x^5(x^2 - 5x + 8)
\][/tex]
Therefore, the correct factored form of the polynomial [tex]\(7x^7 - 35x^6 + 56x^5\)[/tex] is:
[tex]\[
7x^5(x^2 - 5x + 8)
\][/tex]
This matches option A: [tex]\(7x^7 - 35x^6 + 56x^5 = \boxed{7x^5(x^2 - 5x + 8)}\)[/tex].