Exercise 27 Page 239

Substitute -4 for b and 3 for c 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.

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Practice makes perfect

To evaluate the given expression for b = -4 and c = 3, first, we should substitute these values into the expression.

SubstituteII

b= -4, c= 3

-4( 3)

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 one number is negative and one is positive, so the product will be negative.

-4(3)

MultNegPos

(- a)b = - ab

-4* 3

Multiply

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Subchapter links

Guided Practice p.236

Independent Practice p.237-238

H.O.T. Problems p.238

Standardized Test Practice p.238-240

Extra Practice p.239

Common Core Review p.240

Exercise 27 Page 239

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