How many ordered pairs satisfy the system of equations shown?y = x2-3x-10y=(x+2)(x-5)
Question
How many ordered pairs satisfy the system of equations shown?
Solution
The system of equations given is:
y = x^2 - 3x - 10 y = (x + 2)(x - 5)
To find the ordered pairs that satisfy the system, we need to solve the system of equations. Here are the steps:
Step 1: Set the two equations equal to each other since they both equal y:
x^2 - 3x - 10 = (x + 2)(x - 5)
Step 2: Simplify the right side of the equation:
x^2 - 3x - 10 = x^2 - 3x - 10
Step 3: Subtract x^2, add 3x, and add 10 from both sides to get:
0 = 0
This means that the two equations are identical, and any (x, y) that satisfies one equation will satisfy the other.
The solutions to the equation y = x^2 - 3x - 10 can be found by setting y = 0 and solving for x:
x^2 - 3x - 10 = 0
This can be factored to:
(x - 5)(x + 2) = 0
Setting each factor equal to zero gives the solutions x = 5 and x = -2.
Substituting x = 5 into the equation y = x^2 - 3x - 10 gives y = 0. Substituting x = -2 gives y = 0.
So, the ordered pairs that satisfy the system of equations are (5, 0) and (-2, 0).
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