6, Lesson 21, Unit 6, Grade 7, EngageNY icon
Instructional Activity

Discussion

Lesson 21. Unit 6. Grade 7 EngageNY

EngageNY12 min(s)

This Instructional Activity is a part of the Lesson 21, Unit 6, Grade 7. Even though the context of the area calculation only makes sense for positive values of x, what happens if you substitute a negative number into the equation you stated in part (d) of Example 3? Is the resulting number sentence true? Why? Give students time to try a few negative values for in the given equation.

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