Analyze the Quadratic Function: y = 2x² + 3 in Standard Form

Quadratic Coefficients with Missing Linear Terms

y=2x2+3 y=2x^2+3

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find the function's coefficients
00:03 Use the formula to represent a quadratic equation
00:10 Arrange the equation to match the formula
00:32 Separate the variable from the coefficient
00:45 Compare the formula to our equation and find the coefficients
01:00 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

y=2x2+3 y=2x^2+3

2

Step-by-step solution

To solve this problem, we will follow these steps:

  • Step 1: Identify each term in the given function y=2x2+3y = 2x^2 + 3.
  • Step 2: Compare the equation to the standard quadratic form y=ax2+bx+cy = ax^2 + bx + c.
  • Step 3: Determine the coefficients aa, bb, and cc.
  • Step 4: Match these coefficients to the correct multiple-choice option.

Step 1: The given function is y=2x2+3y = 2x^2 + 3. There is no xx term present.

Step 2: Compare this with the standard form y=ax2+bx+cy = ax^2 + bx + c:

  • The coefficient of x2x^2 is a=2a = 2.
  • The coefficient of xx is b=0b = 0 because there is no xx term.
  • The constant term is c=3c = 3.

Step 3: Therefore, the coefficients are a=2a = 2, b=0b = 0, and c=3c = 3.

Step 4: Review the multiple-choice options provided:

  • Choice 1: a=0a = 0, b=2b = 2, c=3c = 3
  • Choice 2: a=0a = 0, b=3b = 3, c=2c = 2
  • Choice 3: a=2a = 2, b=0b = 0, c=3c = 3
  • Choice 4: a=3a = 3, b=0b = 0, c=2c = 2

The correct choice is Choice 3: a=2a = 2, b=0b = 0, c=3c = 3.

Therefore, the solution to the problem is the values a=2a = 2, b=0b = 0, c=3c = 3 which correspond to choice 3.

3

Final Answer

a=2,b=0,c=3 a=2,b=0,c=3

Key Points to Remember

Essential concepts to master this topic
  • Standard Form: Every quadratic follows y=ax2+bx+c y = ax^2 + bx + c structure
  • Missing Terms: When no x term exists, coefficient b equals 0
  • Verification: Substitute back: y=2x2+0x+3 y = 2x^2 + 0x + 3 matches original ✓

Common Mistakes

Avoid these frequent errors
  • Confusing coefficient positions when linear term is missing
    Don't assume a missing x term means a = 0 or mix up the coefficient positions = wrong identification! The coefficient of x² is always 'a', even when there's no x term. Always write the equation as ax² + 0x + c to see all coefficients clearly.

Practice Quiz

Test your knowledge with interactive questions

Identify the coefficients based on the following equation

\( y=x^2 \)

FAQ

Everything you need to know about this question

What happens when there's no x term in the equation?

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When there's no x term, it means the coefficient b = 0. The equation y=2x2+3 y = 2x^2 + 3 is actually y=2x2+0x+3 y = 2x^2 + 0x + 3 in full form.

How do I remember which coefficient is which?

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Use the alphabetical order! In ax2+bx+c ax^2 + bx + c : 'a' goes with x², 'b' goes with x¹, and 'c' is the constant (x⁰).

Can a quadratic function have b = 0?

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Absolutely! Many quadratic functions have b = 0, like y=x2+4 y = x^2 + 4 or y=3x21 y = 3x^2 - 1 . These create symmetric parabolas centered on the y-axis.

What if I wrote the equation as y = 3 + 2x²?

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Great question! Even when terms are rearranged, the coefficients stay the same. Whether you write y=2x2+3 y = 2x^2 + 3 or y=3+2x2 y = 3 + 2x^2 , you still have a = 2, b = 0, c = 3.

How can I double-check my coefficient identification?

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Write out the complete standard form with all terms: y=2x2+0x+3 y = 2x^2 + 0x + 3 . This makes it crystal clear that a = 2, b = 0, and c = 3!

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