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Which equation can be solved by using this system of equations?

[tex]\[
\left\{
\begin{array}{l}
y=3x^5-5x^3+2x^2-10x+4 \\
y=4x^4+6x^3-11
\end{array}
\right.
\][/tex]

A. [tex]\(3x^5-5x^3+2x^2-10x+4=0\)[/tex]

B. [tex]\(3x^5-5x^3+2x^2-10x+4=4x^4+6x^3-11\)[/tex]

C. [tex]\(3x^5+4x^4+x^3+2x^2-10x-7=0\)[/tex]

D. [tex]\(4x^4+6x^3-11=0\)[/tex]


Sagot :

Certainly! Let's analyze the given system of equations and determine which single equation can be derived from it.

The system of equations is:
[tex]\[ \begin{cases} y = 3x^5 - 5x^3 + 2x^2 - 10x + 4 \\ y = 4x^4 + 6x^3 - 11 \end{cases} \][/tex]

To find the equation that can be solved using this system, we will set the two expressions for [tex]\( y \)[/tex] equal to each other since they both equal [tex]\( y \)[/tex]:
[tex]\[ 3x^5 - 5x^3 + 2x^2 - 10x + 4 = 4x^4 + 6x^3 - 11 \][/tex]

This is the equation derived from the system of equations. Now, let's check which option matches this derived equation:

1. [tex]\( 3x^5 - 5x^3 + 2x^2 - 10x + 4 = 0 \)[/tex]

This is not the correct equation because the right-hand side should not be zero.

2. [tex]\( 3x^5 - 5x^3 + 2x^2 - 10x + 4 = 4x^4 + 6x^3 - 11 \)[/tex]

This is the correct equation derived from setting the two expressions for [tex]\( y \)[/tex] equal to each other.

3. [tex]\( 3x^5 + 4x^4 + x^3 + 2x^2 - 10x - 7 = 0 \)[/tex]

This is not correct because the terms and constants do not match the derived equation.

4. [tex]\( 4x^4 + 6x^3 - 11 = 0 \)[/tex]

This is not correct because it is not derived by setting the two equations for [tex]\( y \)[/tex] equal to each other.

Therefore, the correct answer is:
[tex]\[ 3x^5 - 5x^3 + 2x^2 - 10x + 4 = 4x^4 + 6x^3 - 11 \][/tex]
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