Question

Can someone please evaluate the expression with X=3 with work shown? Please and thank you

Answer 1

hi

You will only progress by trying yourself.

so I do the first, you do the rest.

You have to remplace x by 3

so first expression is : x²-4x

by remplacing "x" by it's value (3) we have :

(3)² -4(3) = 9 -12 = -3

Have a try for the rest and ask in comment if you dont understand.

Answer 2

Answers / Step-by-step explanation:

Expression 1.

1. Write the expression.

`x^2-4x`

2. Substitute x by the given value and calculate.

`(3)^2-4(3)=\\ \\9-12=\\ \\-3`

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Expression 2.

1. Write the expression.

`3x^2`

2. Substitute x by the given value and calculate.

`3(3)^2=\\ \\3(9)=\\ \\27.`

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Expression 3.

1. Write the expression.

`2x^3`

2. Substitute x by the given value and calculate.

`2(3)^3=\\ \\2(27)=\\ \\54.`