Solve the system: y = x2 – 7, y = x - 7
Question
Solve the system: y = x2 – 7, y = x - 7
Solution
To solve the system of equations y = x^2 - 7 and y = x - 7, you need to set the two equations equal to each other and solve for x. Here are the steps:
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Set the two equations equal to each other:
x^2 - 7 = x - 7
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Rearrange the equation to one side:
x^2 - x = 0
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Factor the equation:
x(x - 1) = 0
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Set each factor equal to zero and solve for x:
x = 0 or x - 1 = 0, so x = 0 or x = 1
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Substitute x = 0 and x = 1 into either of the original equations to find the corresponding y values. If we substitute into y = x^2 - 7:
For x = 0: y = (0)^2 - 7 = -7 For x = 1: y = (1)^2 - 7 = -6
So, the solutions to the system of equations are (0, -7) and (1, -6).
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