Question

Adding and subtracting polynomials! What is danielle's mistake

Answer 1

Danielle's mistake was that he did not add the middle like-wise terms of 2x² and x² in step 3.

What are Arithmetic operations?

Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions. The operator that performs the arithmetic operation is called the arithmetic operator.

Subtract x³ - 2x² from x² - 6

Danielle's mistake

⇒ (x³ - 2x²) - (x² - 6)

⇒ x³ - 2x² - x² + 6

⇒ x³ - 2x² + 6

He wrote 2x² instead of 3x²,  

Danielle's mistake was that he did not add the middle like-wise terms of 2x² and x² in step 3.

Here is the Correct work as:

⇒ (x³ - 2x²) - (x² - 6)

⇒ x³ - 2x² - x² + 6

⇒ x³ - 3x² + 6

Learn more about Arithmetic operations here:

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