Westonci.ca is your trusted source for finding answers to a wide range of questions, backed by a knowledgeable community. Our platform connects you with professionals ready to provide precise answers to all your questions in various areas of expertise. Connect with a community of professionals ready to provide precise solutions to your questions quickly and accurately.
Sagot :
To find the remainder when dividing the polynomial [tex]\(3x^2 + 6x - 4\)[/tex] by the binomial [tex]\(x + 2\)[/tex], we can perform polynomial long division or use the Remainder Theorem. The Remainder Theorem states that the remainder of the division of a polynomial [tex]\(f(x)\)[/tex] by a linear divisor [tex]\(x - c\)[/tex] is equal to [tex]\(f(c)\)[/tex].
Here, we are dividing by [tex]\(x + 2\)[/tex]. We can rewrite the divisor [tex]\(x + 2\)[/tex] as [tex]\(x - (-2)\)[/tex], so in this case, [tex]\(c = -2\)[/tex].
Let's evaluate the polynomial [tex]\(3x^2 + 6x - 4\)[/tex] at [tex]\(x = -2\)[/tex]:
[tex]\[ f(x) = 3x^2 + 6x - 4 \][/tex]
Substitute [tex]\(x = -2\)[/tex]:
[tex]\[ f(-2) = 3(-2)^2 + 6(-2) - 4 \][/tex]
Now calculate step-by-step:
1. Evaluate the squared term:
[tex]\[ (-2)^2 = 4 \][/tex]
2. Multiply by 3:
[tex]\[ 3 \times 4 = 12 \][/tex]
3. Evaluate the linear term:
[tex]\[ 6 \times (-2) = -12 \][/tex]
4. Combine the evaluated terms and the constant term:
[tex]\[ 12 - 12 - 4 = -4 \][/tex]
Thus, the remainder when [tex]\(3x^2 + 6x - 4\)[/tex] is divided by [tex]\(x + 2\)[/tex] is [tex]\(-4\)[/tex].
So the correct answer is:
[tex]\[ \boxed{-4} \][/tex]
Here, we are dividing by [tex]\(x + 2\)[/tex]. We can rewrite the divisor [tex]\(x + 2\)[/tex] as [tex]\(x - (-2)\)[/tex], so in this case, [tex]\(c = -2\)[/tex].
Let's evaluate the polynomial [tex]\(3x^2 + 6x - 4\)[/tex] at [tex]\(x = -2\)[/tex]:
[tex]\[ f(x) = 3x^2 + 6x - 4 \][/tex]
Substitute [tex]\(x = -2\)[/tex]:
[tex]\[ f(-2) = 3(-2)^2 + 6(-2) - 4 \][/tex]
Now calculate step-by-step:
1. Evaluate the squared term:
[tex]\[ (-2)^2 = 4 \][/tex]
2. Multiply by 3:
[tex]\[ 3 \times 4 = 12 \][/tex]
3. Evaluate the linear term:
[tex]\[ 6 \times (-2) = -12 \][/tex]
4. Combine the evaluated terms and the constant term:
[tex]\[ 12 - 12 - 4 = -4 \][/tex]
Thus, the remainder when [tex]\(3x^2 + 6x - 4\)[/tex] is divided by [tex]\(x + 2\)[/tex] is [tex]\(-4\)[/tex].
So the correct answer is:
[tex]\[ \boxed{-4} \][/tex]
Thank you for your visit. We're dedicated to helping you find the information you need, whenever you need it. We appreciate your time. Please revisit us for more reliable answers to any questions you may have. Thank you for visiting Westonci.ca. Stay informed by coming back for more detailed answers.