Question

When x = 2, what is the value of the expression 5x^2 - 4?

Answer 1

The value of the expression, 5x^2 - 4, when x = 2 is: 16.

What is the the Value of an Expression?

To find the value of an expression, plug in the given value of the variable and solve by simplifying.

Given the expression, 5x^2 - 4, when x = 2, we would have:

5(2)^2 - 4

5(4) - 4

20 - 4

= 16

Therefore, the value of the expression, 5x^2 - 4, when x = 2 is: 16.

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Answer 2

Given~

• $\sf \: x = 2$

Let's Solve~

• $\: \sf \: 5 {x}^{2} - 4$

$\: \:$

• $\sf \: 5(2)^{2} - 4$

$\: \: \:$

• $\sf \: 5(4) - 4$

$\: \: \:$

• $\sf \: 20 - 4$

$\: \: \:$

• $\sf \: 16$

Hope It's Helps~