-3v for v = -2i - j Perform the following operation for the equation.?

Question

Need help, Setting up and solving..Thanks

Answer 1

From the question wording, I am not certain what precisely the problem is.

It appears that you want to solve for -3v, given that v=-2i-j

in that case, you want to insert the value of "v" given in the equation (v=-2i-j) into the expression -3v

so, replace the "v" in -3v with "-2i-j" and you get

-3(-2i-j)

now you just have to reduce this using the distributive property and being careful with your signs

(-3)*(-2i) + (-3)*(-j)

6i+3j

and there we have it

Answer 2

*Have you tried this problem-what is your answer?

Solve - 3v when v = -2i - j

First: we know the given expression for the v-variable, place the value for "v" into the expression...

- 3(-2i - j)

Sec: eliminate parenthesis > multiply the outer term with the terms in the parenthesis...

- 3(-2i) - (-3)(j)

Third: combine the terms...

6i - (-3j)

6i + 3j

Answer 3

did you really not crack open the book whatsoever?

a*(xi+yj)=axi+ayj

-3v = (-3)(-2i) + (-3)(-1j)
-3v = 6i+3j