Question

Evaluate the expression.3u² - 4u + 7 when u = −3

Answer 1

Given:

The expression is:

`3u^2-4u+7`

Find-:

Evaluate the expression when u = -3

Explanation-:

The expression value is:

`=3u^2-4u+7`

Substitute the value of "u" is -3

The value is:

`\begin{gathered} =3u^2-4u+7 \\ \\ =3(-3)^2-4(-3)+7 \\ \\ =3(9)+4(3)+7 \\ \\ =27+12+7 \\ \\ =27+19 \\ \\ =46 \end{gathered}`

The value is 46.