The equation of a parabola is y=x2−4x−1. Write the equation in vertex form.Write any numbers as integers or simplified proper or improper fractions.______
Q. The equation of a parabola is y=x2−4x−1. Write the equation in vertex form.Write any numbers as integers or simplified proper or improper fractions.______
Identify vertex form: Identify the vertex form of a parabola.The vertex form of a parabola is given by y=a(x−h)2+k, where (h,k) is the vertex of the parabola.
Complete square:Complete the square to transform the given equation into vertex form.We have the equation y=x2−4x−1. To complete the square, we need to find a value that, when added and subtracted to the equation, forms a perfect square trinomial with the x-terms. This value is found by taking half of the coefficient of x, squaring it, and then adding and subtracting it from the equation.Half of the coefficient of x is −4/2=−2. Squaring this gives us (−2)2=4. We will add and subtract 4 to the equation.
Add value: Add and subtract the value found in Step 2 to the equation.y=x2−4x+4−4−1Now we have added 4 and subtracted 4, which keeps the equation balanced.
Rewrite equation: Rewrite the equation by grouping the perfect square trinomial and combining the constants.y=(x2−4x+4)−4−1y=(x−2)2−5We have now written the equation in vertex form, where (x−2)2 is the perfect square trinomial and −5 is the combination of the constants.
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