### Home > CC4 > Chapter 1 > Lesson 1.1.1 > Problem 1-9

Simplify each expression. Homework Help ✎

Because both numbers are negative, you can add them. Don't forget to make the answer negative.

−59

Subtracting a negative is the same as adding a positive. This is the same problem as 8 + 9.

Multiply the numbers. Because there is only one negative number, the final answer will be negative.

−72

The rules for dividing negative numbers are the same as the rules for multiplying them.

Multiplying two negative numbers gives a positive number.

−2(−3) = 6 So −2(−3)(−4) = 6(−4)

Multiplying a positive and a negative makes a negative.

6(−4) = −24

−24

Subtracting is the same as adding a negative number. Refer to part (a).

Because the exponent is outside the parentheses, think of this as (−5)(−5).

25

Think of this as −(5²) which is −(5)(5).

What positive number multiplied by itself is 49?

7