What should you do first when solving the equation below? $$2x+x^2=7$$

Put the equation in standard form

Write down: $$a=2,\ b=1,\ c=7$$

A student was asked to solve the quadratic equation $$x^2-8x=9$$ using the quadratic formula. What error occurred in their work?

The student used $$8$$ for b and should have used $$-8$$

The student used $$-9$$ for c and should have used $$9$$

The student solved by factoring instead of using the quadratic formula

A student was asked to solve the quadratic equation $$2x^2-3x=13$$ using the quadratic formula. What error occurred in their work?

The student used $$13$$ for c and should have used $$-13$$ since the equation needs to be in standard form.

The student solved by factoring instead of using the quadratic formula

The student changed $$-\left(-3\right)$$ to $$3$$ and $$-\left(-3\right)\ne3$$

A student was asked to solve the quadratic equation $$x^2-49=0$$ using the quadratic formula. What error occurred in their work?

The student used $$-49$$ for b and $$-49$$ should have been used for c.

The student solved by factoring instead of using the quadratic formula.

The student forgot to divide by $$2$$ when getting their final answer.

A student was asked to solve the quadratic equation $$5x^2-2x=11$$ using the quadratic formula. What error occurred in their work?

The student didn't put parentheses around the $$-2$$ which will result in an incorrect calculation.

The student solved by factoring instead of using the quadratic formula.

The student should should have rounded even though there were no instructions to round the answer.

A student was asked to solve the quadratic equation $$x^2-5x+6=0$$ using the quadratic formula. What error occurred in their work?

The student solved by factoring instead of using the quadratic formula.

The student did not put the equation in standard form.

The student has incorrect solutions as their final answer.

Solving Quadratics Error Analysis

9th - 12th Grade

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15 Qs

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Solving Quadratics Error Analysis

Quiz

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Mathematics

•

9th - 12th Grade

•

Practice Problem

•

Medium

•

CCSS

HSA-REI.B.4B

Standards-aligned

Barbara White

Used 2+ times

FREE Resource

15 questions

Show all answers

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is this formula?

This is the standard formula.

This is the quadratic formula.

This is the square root formula.

This is the Pythagorean formula

Tags

CCSS.HSA-REI.B.4B

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

-1

-10

Tags

CCSS.HSA-REI.B.4B

MULTIPLE SELECT QUESTION

2 mins • 1 pt

The solution(s) to a quadratic equation is....? CHOOSE ALL THAT APPLY

where the parabola (the graph of the equation) crosses the x-axis

the x-value(s) of the equation when y = 0

where the parabola (the graph of the equation) crosses the y-axis

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

True or False: A quadratic equation must be in standard form to use the quadratic formula.

True

False

Tags

CCSS.HSA-REI.B.4B

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Factor

Write down: a = 1, b = 6, c = -13

Subtract 3 from both sides.

Add 3 to both sides.

Tags

CCSS.HSA-REI.B.4B

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