In this worksheet, we will practice proving polynomial identities.

Q1:

Determine which of the following expressions is equivalent to (𝑥+𝑦+𝑧).

Q2:

Is the equation 𝑥−𝑦=(𝑥+𝑦)(𝑥−𝑦)(𝑥+𝑦) an identity?

Q3:

Is the equation 𝑥−𝑦𝑥−𝑦=𝑥+𝑦 an identity?

Q4:

Is the equation 𝑥−𝑦=(𝑥−𝑦)𝑥+𝑥𝑦+𝑦 an identity?

Q5:

Is the equation 𝑥+𝑦𝑥+𝑦=𝑥+𝑦 an identity?

Q6:

Is the equation 𝑥+𝑦𝑥+𝑦=𝑥+𝑦 an identity?

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