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Which system of equations can be graphed to find the solution(s) to [tex]x^2=2x+3[/tex]?

A. [tex]\left\{\begin{array}{l} y=x^2+2x+3 \\ y=2x+3 \end{array}\right.[/tex]

B. [tex]\left\{\begin{array}{l} y=x^2-3 \\ y=2x+3 \end{array}\right.[/tex]

C. [tex]\left\{\begin{array}{l} y=x^2-2x-3 \\ y=2x+3 \end{array}\right.[/tex]

D. [tex]\left\{\begin{array}{l} y=x^2 \\ y=2x+3 \end{array}\right.[/tex]


Sagot :

To determine which system of equations can be graphed to find the solutions to [tex]\( x^2 = 2x + 3 \)[/tex], we need to express the original equation in a format that can be compared graphically:

1. We start with the equation [tex]\( x^2 = 2x + 3 \)[/tex].

2. We need to rewrite this equation in the standard form [tex]\( y = f(x) \)[/tex] for both graphs that we want to solve for intersections.

3. Subtract [tex]\( 2x + 3 \)[/tex] from both sides to get the equation in [tex]\( y = 0 \)[/tex] form:
[tex]\[ x^2 - 2x - 3 = 0 \][/tex]

4. Now, we separate this into two functions to form a system of equations:
- Let [tex]\( y = x^2 - 2x - 3 \)[/tex]
- And let [tex]\( y = 2x + 3 \)[/tex]

Thus, the system of equations that can be graphed to find the solution(s) to [tex]\( x^2 = 2x + 3 \)[/tex] is:

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

So, the correct answer is:
[tex]\[ \left\{ \begin{array}{l} y = x^2 - 2x - 3 \\ y = 2x + 3 \end{array} \right. \][/tex]