Question

Compare the structure of the two

expressions.
Expression 1
Expression 2
3x
4x + 9(2x + 1) x² + 6(-2x + 1) - 3(7 + x?)

Answer 1

1. single term
2. sum of 4 terms, some of which can be expanded further

Explanation:

1. 3x

This is a single term with one variable of the first degree.

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2. 4x + 9(2x + 1) x² + 6(-2x + 1) - 3(7 + x?)

This is a sum of 4 terms, some of which can be expanded:

• 4x
• 9(2x+1)x^2 ⇒ 18x^3 +9x^2
• 6(-2x +1) ⇒ -12x +6
• -3(7+x?) ⇒ -3x? -21

The expression can be simplified by combining like terms.