Solving Quadratics with the Quadratic Formula: Day 2 Practice

This video tutorial covers solving quadratic equations using the quadratic formula. It begins with an introduction to the quadratic formula and the discriminant, explaining their roles in determining the number of solutions. The tutorial progresses through six examples, each building on the previous one, to demonstrate the step-by-step process of solving quadratic equations. The instructor emphasizes the importance of simplifying each step to avoid errors, especially when using a calculator. The video concludes with a complex example that requires putting the equation in standard form and simplifying square roots.

What does the discriminant in a quadratic equation indicate?

• The number of solutions

• The value of the variable x

• The coefficient of x

• The maximum value of the quadratic equation

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CCSS.HSA-REI.B.4B

What is the result of the square root of 25 in the quadratic formula?

• 9

• 5

• 3

• 7

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CCSS.HSA-REI.B.4B

How many solutions does a quadratic equation have if the discriminant is 16?

• 1

• 2

• 3

• Cannot be determined

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CCSS.HSA-REI.B.4B

What is the solution to a quadratic equation when the discriminant is 0?

• One real solution

• Two real solutions

• No real solution

• Infinite solutions

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CCSS.HSA-REI.B.4B

What is the simplified form of the quadratic equation solution when the discriminant is 1?

• 2 and 1

• 3 and 2

• 4 and 3

• 5 and 4

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CCSS.HSA-REI.B.4B

In the quadratic formula, what does 'a' represent?

• The discriminant

• The constant term

• The coefficient of x

• The coefficient of x^2

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CCSS.HSA-REI.B.4B

What is the first step in solving a quadratic equation using the quadratic formula?

• Set the equation to equal zero

• Identify the coefficients a, b, and c

• Simplify the equation

• Find the discriminant

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CCSS.HSA-REI.B.4B

How do you enter a negative number squared into a calculator to avoid errors?

• It doesn't matter how you enter it

• Just type the negative number and square it

• Use parentheses around the negative number before squaring

• Multiply the number by -1 and then square it

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CCSS.6.EE.A.1

What does the square root of 20 simplify to when using simplified square roots?

• 2 square roots of 5

• 4 square roots of 5

• 10 square roots of 2

• 5 square roots of 4

What is the correct way to simplify the equation when the numerator can be factored out?

• Multiply the numerator and denominator by the common factor

• Add the common factor to both numerator and denominator

• Divide the numerator and denominator by the common factor

• Subtract the common factor from both numerator and denominator

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CCSS.HSA.APR.D.6