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Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
1. Algebraic Expressions
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Exercise 12 Page 95

Terms are separated by + signs.

Terms: - x, - 9x^2, 12x^2, and 7
Like Terms: - 9x^2 and 12x^2

Practice makes perfect
An algebraic expression is a combination of numbers, variables, and mathematical operations. Terms are separated by + signs. With this information in mind, let's identify the terms in the given expression. We will first rewrite it as a sum of terms.

- x - 9x^2 + 12x^2 + 7 ⇓ - x + ( - 9x^2) + 12x^2 + 7 We can see that the expression has four terms, - x, - 9x^2, 12x^2, and 7. Now that we know the terms, we can figure out which ones are like terms. Remember, like terms are terms that have the same variable and the same exponent. In this case, - 9x^2 and 12x^2 are like terms.

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arrow_right Self-Assessment for Concept & Skills p.93
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arrow_right Self-Assessment for Problem Solving p.94
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