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QProblem

Can you help me solve 2x^2 - 8x + 6 = 0 step by step? I keep getting it wrong.

ASolution

Step‑by‑step solution

  1. Write the equation

    2x28x+6=02x^{2}-8x+6=0
  2. Simplify (divide every term by the common factor 2)

    x24x+3=0x^{2}-4x+3=0
  3. Factor the quadratic – look for two numbers that multiply to +3+3 and add to 4-4.
    Those numbers are 1-1 and 3-3.

    x24x+3=(x1)(x3)=0x^{2}-4x+3=(x-1)(x-3)=0
  4. Apply the zero‑product property (if a product is zero, at least one factor is zero).

    {x1=0x3=0\begin{cases} x-1=0 \\ x-3=0 \end{cases}
  5. Solve each simple equation

    x=1orx=3x=1 \quad \text{or} \quad x=3

Check with the quadratic formula (optional)

For ax2+bx+c=0ax^{2}+bx+c=0, x=b±b24ac2ax=\dfrac{-b\pm\sqrt{b^{2}-4ac}}{2a}.

Here a=2a=2, b=8b=-8, c=6c=6:

x=(8)±(8)24(2)(6)2(2)=8±64484=8±164=8±44x=\frac{-(-8)\pm\sqrt{(-8)^{2}-4(2)(6)}}{2(2)} =\frac{8\pm\sqrt{64-48}}{4} =\frac{8\pm\sqrt{16}}{4} =\frac{8\pm4}{4}

Thus x=124=3x=\dfrac{12}{4}=3 or x=44=1x=\dfrac{4}{4}=1, matching the factor‑method result.


Final Answer

x=1    or    x=3x = 1 \;\; \text{or} \;\; x = 3

If you’d like a visual walkthrough of these methods, the video below explains both factoring and the quadratic formula in detail.

VVisualizations

Video: How To Solve Quadratic Equations By Factoring - Quick & Simple! | Algebra Online Course
Video: Factoring vs Completing the Square vs Quadratic Formula
Video: How To Solve Quadratic Equations Using The Quadratic Formula
Shared on 8/19/2026

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