Answer :
Sure! To find the product of the given expression [tex]\((7x^2)(2x^3 + 5)(x^2 - 4x - 9)\)[/tex], we'll follow these steps:
1. Distribute [tex]\(7x^2\)[/tex] into the second polynomial [tex]\((2x^3 + 5)\)[/tex]:
[tex]\[
7x^2 \times (2x^3 + 5) = 7x^2 \times 2x^3 + 7x^2 \times 5
\][/tex]
Calculate:
- [tex]\(7x^2 \times 2x^3 = 14x^5\)[/tex]
- [tex]\(7x^2 \times 5 = 35x^2\)[/tex]
So, after this step, we have the expression:
[tex]\[
14x^5 + 35x^2
\][/tex]
2. Multiply the result from the previous step by the third polynomial [tex]\((x^2 - 4x - 9)\)[/tex]:
[tex]\((14x^5 + 35x^2) \times (x^2 - 4x - 9)\)[/tex]
Distribute each term of the first polynomial over each term of the second polynomial:
- [tex]\(14x^5 \times x^2 = 14x^7\)[/tex]
- [tex]\(14x^5 \times (-4x) = -56x^6\)[/tex]
- [tex]\(14x^5 \times (-9) = -126x^5\)[/tex]
- [tex]\(35x^2 \times x^2 = 35x^4\)[/tex]
- [tex]\(35x^2 \times (-4x) = -140x^3\)[/tex]
- [tex]\(35x^2 \times (-9) = -315x^2\)[/tex]
3. Combine all the terms:
[tex]\[
14x^7 - 56x^6 - 126x^5 + 35x^4 - 140x^3 - 315x^2
\][/tex]
So, the final result of the product is:
[tex]\[
14x^7 - 56x^6 - 126x^5 + 35x^4 - 140x^3 - 315x^2
\][/tex]
This is the expanded form of the product of the given expression.
1. Distribute [tex]\(7x^2\)[/tex] into the second polynomial [tex]\((2x^3 + 5)\)[/tex]:
[tex]\[
7x^2 \times (2x^3 + 5) = 7x^2 \times 2x^3 + 7x^2 \times 5
\][/tex]
Calculate:
- [tex]\(7x^2 \times 2x^3 = 14x^5\)[/tex]
- [tex]\(7x^2 \times 5 = 35x^2\)[/tex]
So, after this step, we have the expression:
[tex]\[
14x^5 + 35x^2
\][/tex]
2. Multiply the result from the previous step by the third polynomial [tex]\((x^2 - 4x - 9)\)[/tex]:
[tex]\((14x^5 + 35x^2) \times (x^2 - 4x - 9)\)[/tex]
Distribute each term of the first polynomial over each term of the second polynomial:
- [tex]\(14x^5 \times x^2 = 14x^7\)[/tex]
- [tex]\(14x^5 \times (-4x) = -56x^6\)[/tex]
- [tex]\(14x^5 \times (-9) = -126x^5\)[/tex]
- [tex]\(35x^2 \times x^2 = 35x^4\)[/tex]
- [tex]\(35x^2 \times (-4x) = -140x^3\)[/tex]
- [tex]\(35x^2 \times (-9) = -315x^2\)[/tex]
3. Combine all the terms:
[tex]\[
14x^7 - 56x^6 - 126x^5 + 35x^4 - 140x^3 - 315x^2
\][/tex]
So, the final result of the product is:
[tex]\[
14x^7 - 56x^6 - 126x^5 + 35x^4 - 140x^3 - 315x^2
\][/tex]
This is the expanded form of the product of the given expression.