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3 years ago

What is the value of 2x2 + 3x - 5 when x = -2 ?

Mathematics

2 answers:

levacccp [35]3 years ago

5 0

Answer:

The value of the expression, when x = -2, is -3

Step-by-step explanation:

To solve this, we need to plug the -2 into the expression and use the order of operations.

2*(-2)²+3(-2)-5

According to the order of operations, we must start with anything in parenthesis.

2*(-2)²+(-6)-5

Now, we do the exponents.

2*4+(-6)-5

Now, we do multiplication.

8+(-6)-5

Now we do addition and subtraction, starting with whichever is first.

2-5

Remember that subtracting a positive is the same as adding a negative.

-3

Our answer is -3

Lelu [443]3 years ago

3 0

Answer:

Step-by-step explanation:

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