1. Lesson 7.2: Cube roots Objectives: To determine the cube root of a number. To Solve a cube root equation. EQ: How do you evaluate a cube root expression?

2. Cube Roots: Unlike square roots where we look for a number multiplied by itself, cube roots have a number multiplied by itself and by itself again. EX: Evaluate Determine what number times itself and by itself again equals 8.

3. Ex: Evaluate = -4 =3 = -5 Cube roots can be negative, square roots can’t be negative.

4. Large Perfect Cubes You can use a factor tree to determine the cube root of a number. 512 4 128 2 2 4 32 2 2 4 8 2 2 2 4 2 8

5. Solving cubic equations X = 2 + 4 +4 = 3

6. EX: Determine the side lengths of the cube. V = 27in 3 2 2 x = 4 Side = 3inches