Exercise 32 Page 239

Substitute -6 for a and -4 for b in the expression. When multiplying real numbers, the product 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 a = -6 and b = -4, first, we should substitute these values into the expression.

-2a+b

SubstituteII

a= -6, b= -4

-2( -6)+( -4)

When multiplying real numbers, the product 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 product will be positive.

-2(-6)+(-4)

MultNegNegOnePar

- a(- b)=a* b

2* 6+(-4)

Multiply

12+(-4)

AddTerms

Add terms