High School

Dear beloved readers, welcome to our website! We hope your visit here brings you valuable insights and meaningful inspiration. Thank you for taking the time to stop by and explore the content we've prepared for you.
------------------------------------------------ Combine the expressions:

[tex] \left(-8x^6 + 10x^4 + 10x^2 - 1\right) + \left(4x^4 - 7x^2 + 5x - 2\right) [/tex]

Choose the correct result:

A. [tex] -4x^6 + 3x^4 + 3x^2 + 5x + 1 [/tex]

B. [tex] -8x^6 + 14x^4 + 3x^2 + 5x - 3 [/tex]

C. [tex] 14x^6 - 3 [/tex]

D. [tex] -1x^6 + 3x^4 + 15x + 1 [/tex]

Answer :

Sure! Let's solve the problem of adding the two given polynomials step-by-step:

We have the polynomials:
1. [tex]\(-8x^6 + 10x^4 + 10x^2 - 1\)[/tex]
2. [tex]\(4x^4 - 7x^2 + 5x - 2\)[/tex]

We need to add these polynomials together. To do this, we combine like terms, which are terms with the same power of [tex]\(x\)[/tex].

### Step 1: Combine the [tex]\(x^6\)[/tex] terms
- The first polynomial has [tex]\(-8x^6\)[/tex].
- The second polynomial has no [tex]\(x^6\)[/tex] term.
- So, the combined [tex]\(x^6\)[/tex] term is [tex]\(-8x^6\)[/tex].

### Step 2: Combine the [tex]\(x^4\)[/tex] terms
- The first polynomial has [tex]\(10x^4\)[/tex].
- The second polynomial has [tex]\(4x^4\)[/tex].
- Combined, these make [tex]\(10x^4 + 4x^4 = 14x^4\)[/tex].

### Step 3: Combine the [tex]\(x^2\)[/tex] terms
- The first polynomial has [tex]\(10x^2\)[/tex].
- The second polynomial has [tex]\(-7x^2\)[/tex].
- Combined, these make [tex]\(10x^2 - 7x^2 = 3x^2\)[/tex].

### Step 4: Combine the [tex]\(x\)[/tex] terms
- The first polynomial has no [tex]\(x\)[/tex] term.
- The second polynomial has [tex]\(5x\)[/tex].
- So, the combined [tex]\(x\)[/tex] term is [tex]\(5x\)[/tex].

### Step 5: Combine the constant terms
- The first polynomial has [tex]\(-1\)[/tex].
- The second polynomial has [tex]\(-2\)[/tex].
- Combined, these make [tex]\(-1 - 2 = -3\)[/tex].

Putting it all together, the resulting polynomial after adding the two polynomials is:
[tex]\[
-8x^6 + 14x^4 + 3x^2 + 5x - 3
\][/tex]

This matches option b:
[tex]\[
\text{b. } -8x^6 + 14x^4 + 3x^2 + 5x - 3
\][/tex]

So, the correct answer is [tex]\(\text{b}\)[/tex].