seymani2
06.05.2020 •
Mathematics
What is the vertex of the quadratic function y = (x + 2)(x -8)?
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Ответ:
(3, -25)
Step-by-step explanation:
Given
y = (x + 2)(x -8) in factored formWriting is standard form
y = x² - 8x + 2x - 16 == x² - 6x - 16Vertex is obtained at x = -b/2a
x = -(-6)/2*1 = 3y- coordinate is:
y = 3² - 6*3 - 16 = 9 - 18 - 16 = -25So vertex is:
(3, -25)Ответ:
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