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

Put the equation in standard form

Error in solving the quadratic equation $$x^2-8x=9$$ using the quadratic formula?

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

Error in solving the quadratic equation $$2x^2-3x=13$$ using the quadratic formula.

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

Error in solving the quadratic equation $$x^2-49=0$$ using the quadratic formula.

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

What error occurred when a student solved the quadratic equation $$5x^2-2x=11$$ using the quadratic formula?

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

Error in solving the quadratic equation $$x^2-5x+6=0$$ using the quadratic formula?

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

Quadratic Formula and Error Analysis Flashcards

Student preview

14 questions

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1.

FLASHCARD QUESTION

Front

Back

2.

FLASHCARD QUESTION

Front

What is this formula?

Back

This is the quadratic formula.

3.

FLASHCARD QUESTION

Front

Back

10

4.

FLASHCARD QUESTION

Front

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

Back

True

5.

FLASHCARD QUESTION

Front

Back

6.

FLASHCARD QUESTION

Front

Back

Subtract 3 from both sides.

7.

FLASHCARD QUESTION

Front

Back

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