If x = 2, what is the value of 3x² + 4x - 5?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Excel in the CXC CSEC Mathematics Exam. Prepare with comprehensive quizzes featuring multiple choice questions, accessible hints, and explanations. Boost your confidence and knowledge!

Multiple Choice

If x = 2, what is the value of 3x² + 4x - 5?

Explanation:
To find the value of the expression \( 3x² + 4x - 5 \) when \( x = 2 \), we will substitute \( 2 \) into the expression and simplify it step by step. First, substitute \( x \) with \( 2 \): \[ 3(2)² + 4(2) - 5 \] Now, calculate \( (2)² \): \[ (2)² = 4 \] Next, multiply \( 3 \) by \( 4 \): \[ 3 \times 4 = 12 \] Then, calculate \( 4 \times 2 \): \[ 4 \times 2 = 8 \] Now, we can substitute these values back into the expression: \[ 12 + 8 - 5 \] Combine \( 12 \) and \( 8 \): \[ 12 + 8 = 20 \] Now, subtract \( 5 \) from \( 20 \): \[ 20 - 5 = 15 \] Thus, the value of the expression \( 3x² + 4x - 5 \) when \(

To find the value of the expression ( 3x² + 4x - 5 ) when ( x = 2 ), we will substitute ( 2 ) into the expression and simplify it step by step.

First, substitute ( x ) with ( 2 ):

[

3(2)² + 4(2) - 5

]

Now, calculate ( (2)² ):

[

(2)² = 4

]

Next, multiply ( 3 ) by ( 4 ):

[

3 \times 4 = 12

]

Then, calculate ( 4 \times 2 ):

[

4 \times 2 = 8

]

Now, we can substitute these values back into the expression:

[

12 + 8 - 5

]

Combine ( 12 ) and ( 8 ):

[

12 + 8 = 20

]

Now, subtract ( 5 ) from ( 20 ):

[

20 - 5 = 15

]

Thus, the value of the expression ( 3x² + 4x - 5 ) when (

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy