Quadratic Equations Algebra

What is the y-intercept?

The parabola for y = x² - 2x - 3 is graphed.

Use the graph to find the solution(s) for

0 = x² - 2x - 3

• x = -1, x = 3

• x = 0, x = -3

• x = 1, x = -4

• x = -3

If a parabola has x-intercepts at (2, 0) and (10, 0), what is the x-coordinate of the vertex?

• 6

• 4

• 8

• 5

What are the x-intercepts for y = (2x + 1)(x - 2) *hint: let y = 0 and solve for x

• -1/2 and 2

• 0 and 2

• -2 and 1/2

• 0 and 1/2

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Mathematical Equivalence

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Mathematical Equivalence

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Mathematical Equivalence

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Mathematical Equivalence

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Mathematical Equivalence

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A parabola has x-intercepts at (3,0) and (-2, 0), which equation can represent this.

• y = (x - 3)(x + 2)

• y = (x + 3)(x - 2)

• y = x² + 3x - 2

• y = x² - 3x + 2