Solve the following system of equations algebraically:y, equals, x, squared, plus, 6, x, minus, 6y=x 2 +6x−6y, equals, 3, x, minus, 2y=3x−2
Question
Solve the following system of equations algebraically:
Solution
The system of equations is:
- y = x^2 + 6x - 6
- y = 3x - 2
To solve this system algebraically, we can set the two equations equal to each other because they both equal y:
x^2 + 6x - 6 = 3x - 2
Next, we can simplify this equation by subtracting 3x and adding 2 to both sides:
x^2 + 3x - 4 = 0
This is a quadratic equation, which we can solve by factoring:
(x + 4)(x - 1) = 0
Setting each factor equal to zero gives the solutions x = -4 and x = 1.
We can substitute these values back into the original equations to find the corresponding y values.
For x = -4:
y = (-4)^2 + 6*(-4) - 6 = 16 - 24 - 6 = -14
For x = 1:
y = (1)^2 + 6*1 - 6 = 1 + 6 - 6 = 1
So the solutions to the system of equations are (-4, -14) and (1, 1).
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