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3 years ago

8

How is place value used to model and find products when multiplying 2 digit numbers?

1 answer:

Aleksandr-060686 [28]3 years ago

6 0

Answer:

1 x 4=4 (Both numbers are in the ones place, so their value are ones.)

Step-by-step explanation

In order to use place value to multiply, we use the distributive property to break apart each place. Always begin with the ones place. We can break apart a 2-digit by 1-digit number into 2 simpler problems. 1 x 4=4 (Both numbers are in the ones place, so their value are ones.)

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3 years ago

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3 years ago

In the third degree polynomial function f(x) =x^3 + 4x, why are 2i and -2i zeros?

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Answer:

We just need to evaluate and get f(2i)=0, f(-2i)=0.

Step-by-step explanation:

Since $i^2=-1$ , then $i^3=i^2i=-i$ , and we can apply this when we evaluate $f(x) =x^3 + 4x$ for 2i and -2i.

First we have:

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Which shows that -2i is a zero of f(x).

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3 years ago