Analyze the Parabola y=(x-2)(x+1): Finding the Turning Point

Does the parable

y=(x2)(x+1) y=(x-2)(x+1)

Is there a minimum or maximum point?

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Step-by-step video solution

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00:00 Does the parabola have a maximum or minimum point?
00:03 Let's properly open parentheses, multiply each factor by each factor
00:13 Let's group the factors
00:21 The coefficient A of the function is positive, therefore the parabola is smiling
00:26 Therefore the parabola has a minimum point
00:31 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

Does the parable

y=(x2)(x+1) y=(x-2)(x+1)

Is there a minimum or maximum point?

2

Step-by-step solution

To determine if the function y=(x2)(x+1) y = (x-2)(x+1) has a minimum or maximum point, we start by converting it from product form to standard form:

y=(x2)(x+1) y = (x-2)(x+1)

Expanding the expression:

y=x2+x2x2 y = x^2 + x - 2x - 2

Simplify:

y=x2x2 y = x^2 - x - 2

In standard form, y=x2x2 y = x^2 - x - 2 , the coefficient of x2 x^2 , which is a=1 a = 1 , is positive. A positive a a indicates the parabola opens upwards.

Since the parabola opens upwards, it has a minimal point (vertex) as its lowest point.

Therefore, the parabola y=(x2)(x+1) y = (x-2)(x+1) has a minimal point.

3

Final Answer

Minimal point

Practice Quiz

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What is the value of the coefficient \( b \) in the equation below?

\( 3x^2+8x-5 \)

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