Question

Evaluate -3ab when a= -2 and b= -5

Answer 1

-30

Explanation:

Plug in -2 for a & -5 for b in the expression given:

-3ab = (-3)(-2)(-5)

Multiply across. Note that:

Negative number x negative number = positive number.

Positive number x negative number = negative number.

(-3)(-2)(-5) = (6)(-5) = -30

-30 is your answer.

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Answer 2

-30

Explanation:

-3ab original equation

-3(-2)(-5) . plug in numerical values

6(-5) . -3 times -2 is 6

-30 . 6 times -5 is -30.