Evaluate -(-2)³: Working with Negative Numbers and Exponents

Question

(2)3= -(-2)^3=

Video Solution

Step-by-Step Solution

To solve the expression (2)3-(-2)^3, we need to first calculate the inner power and then apply the outer negative sign.

  • Step 1: Calculate (2)3(-2)^3.
    Since (2)(-2) is raised to the power of 3, we perform the multiplication: (2)×(2)×(2)(-2) \times (-2) \times (-2).
    (2)×(2)=4(-2) \times (-2) = 4.
    Continuing, 4×(2)=84 \times (-2) = -8.
    Thus, (2)3=8(-2)^3 = -8.
  • Step 2: Apply the outer negative sign.
    We have (2)3=(8)-(-2)^3 = -(-8).
    According to arithmetic rules, a negative times a negative becomes positive, so (8)=8-(-8) = 8.

Therefore, the solution to the problem is 8 8 , which matches choice number 2.

Answer

8 8