Understanding Kenisha's Subtraction Error

Kenisha is tasked with subtracting one polynomial from another. She sets up the problem correctly in the first step but makes an error in the second step by incorrectly distributing the negative sign. This mistake affects the rest of her calculations. The video analyzes this error and explains its impact on the final solution.

What was Kenisha asked to do with the algebraic expressions?

• Add them together

• Multiply them

• Divide them

• Subtract one from the other

Tags

CCSS.6.EE.A.2C

In the first step, what did Kenisha do correctly?

• She set up the subtraction correctly

• She added the expressions

• She multiplied the expressions

• She divided the expressions

Tags

CCSS.8.EE.C.7B

What mistake did Kenisha make in the second step?

• She added instead of subtracting

• She did not distribute the negative sign correctly

• She forgot to include a term

• She multiplied instead of dividing

Tags

CCSS.7.EE.A.1

How should the negative sign have been distributed for the term -5B?

• It should become +10B

• It should become -10B

• It should become +5B

• It should remain -5B

Tags

CCSS.6.EE.A.3

What was the correct result for the constant term after distribution?

• It should be +2

• It should be -1

• It should be +1

• It should be -2

Tags

CCSS.7.EE.A.1

What was the impact of Kenisha's error on the b^2 terms?

• It doubled the coefficients

• It had no impact

• It resulted in subtracting the coefficients incorrectly

• It resulted in adding the coefficients

What should have been the result of 3B + 5B?

• 5B

• 0B

• 2B

• 8B

Tags

CCSS.7.EE.B.3

What was the correct operation for the constant terms?

• 11 / 1

• 11 - 1

• 11 + 1

• 11 * 1

Tags

CCSS.HSA.REI.A.1

What was the main reason for the incorrect final result?

• Wrong addition of terms

• Error in distributing the negative sign

• Incorrect multiplication of terms

• Incorrect initial setup

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What was the overall impact of the error in step two?

• It had no impact on the final result

• It caused errors in subsequent steps

• It led to a correct final result

• It simplified the problem

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B