Exercise 15 Page 248

Substitute -9 for d and 36 for f in the expression. When dividing real numbers, the quotient will be positive if the signs are the same and it will be negative if the signs are different.

Practice makes perfect

To evaluate the given expression for d=-9 and f=36, first, we should substitute these values into the expression.

-f/d

SubstituteII

d= -9, f= 36

- 36/-9

When dividing real numbers, the quotient will be positive if the signs are the same and it will be negative if the signs are different.

cc Same Sign & Different Signs (+)÷(+)=(+) & (+)÷(-)=(-) (-)÷(-)=(+) & (-)÷(+)=(-) In our case both numbers are negative, so the quotient will be positive.

-36/-9

DivNegNeg

- a/- b=a/b

36/9

CalcQuot

Calculate quotient

We can verify this using a calculator.