The standard form of the equation of a parabola is y = 2x2 + 16x + 17.What is the vertex form of the equation?
Question
The standard form of the equation of a parabola is y = 2x2 + 16x + 17.What is the vertex form of the equation?
Solution
The vertex form of a parabola's equation is given by y = a(x-h)² + k, where (h, k) is the vertex of the parabola.
To convert the standard form y = 2x² + 16x + 17 to vertex form, we complete the square for the x terms.
First, factor out the coefficient of x² from the first two terms:
y = 2(x² + 8x) + 17
To complete the square, we need to add and subtract (8/2)² = 16 inside the parentheses:
y = 2(x² + 8x + 16 - 16) + 17
Simplify the equation:
y = 2[(x + 4)² - 16] + 17
Distribute the 2:
y = 2(x + 4)² - 32 + 17
Simplify the constants:
y = 2(x + 4)² - 15
So, the vertex form of the equation is y = 2(x + 4)² - 15.
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