Solve The Quadratic Equation By Quadratic Formula Worksheet

Algebra 2
Quadratic Equations

Total questions - 0

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How Will This Worksheet on “Solve the Quadratic Equation by Quadratic Formula” Benefit Your Student's Learning?

  • Reinforces understanding of the quadratic formula.
  • Provides extensive practice in solving quadratic equations.
  • Bridges theoretical math concepts with real-world applications.
  • Improves algebraic manipulation skills.
  • Enhances graphing and visual interpretation abilities.
  • Prepares students effectively for exams and assessments.
  • Encourages independent problem-solving.
  • Develops critical thinking through logical problem-solving steps.

How to Solve the Quadratic Equation by Quadratic Formula?

`1`. Ensure the equation is in the form \( ax^2 + bx + c = 0 \) and identify the values of \( a \), \( b \), and \( c \).

`2`. Substitute the values of \( a \), \( b \), and \( c \) into the quadratic formula:

\[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \]

`3`. Compute \( b^2 - 4ac \), known as the discriminant.

`4`. Depending on the value of the discriminant:

  • If \( b^2 - 4ac > 0 \), there are two real solutions.
  • If \( b^2 - 4ac = 0 \), there is one real solution (a repeated root).
  • If \( b^2 - 4ac < 0 \), there are two complex solutions.

`5`. Substitute the discriminant value into the formula and calculate \( x \) using both the plus and minus signs in the formula to find the solutions.

Solved Example

Q. Solve using the quadratic formula.\newline2d28d+6=02d^2 - 8d + 6 = 0\newlineWrite your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.\newlined = _____ or d = _____
Solution:
  1. Identify values: Identify the values of aa, bb, and cc in the quadratic equation 2d28d+6=02d^2 - 8d + 6 = 0 by comparing it to the standard form ax2+bx+c=0ax^2 + bx + c = 0.\newlinea=2a = 2\newlineb=8b = -8\newlinec=6c = 6
  2. Substitute in formula: Substitute the values of aa, bb, and cc into the quadratic formula to find dd.d=b±b24ac2ad = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}d=(8)±(8)242622d = \frac{-(-8) \pm \sqrt{(-8)^2 - 4\cdot2\cdot6}}{2\cdot2}
  3. Simplify terms: Simplify the terms under the square root and the constants outside the square root. \newlined=8±64484d = \frac{8 \pm \sqrt{64 - 48}}{4}\newlined=8±164d = \frac{8 \pm \sqrt{16}}{4}
  4. Calculate square root: Calculate the square root of 1616 and simplify the expression further.\newlined=(8±4)4d = \frac{(8 \pm 4)} {4}\newlineIdentify the two possible values for dd.\newlined=(8+4)4d = \frac{(8 + 4)} {4}or d=(84)4d = \frac{(8 - 4)} {4}
  5. Identify possible values: Solve for the two values of dd.\newlined=124d = \frac{12}{4} or \newlined=44d = \frac{4}{4}\newlined=3d = 3, or d=1d = 1
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About Worksheet

Algebra 2
Quadratic Equations

Solving a quadratic equation using the quadratic formula means finding the values of \( x \) that satisfy \( ax^2 + bx + c = 0 \) by using the formula `x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}`. This formula helps pinpoint where the equation equals zero on a graph, giving precise solutions based on the equation's coefficients \( a \), \( b \), and \( c \). Use these worksheets to enhance your problem solving skills.

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