Algebra Question


Question

Solve for xxx:

2x24x6=02x^2 – 4x – 6 = 02x24x6=0


Solution

We use the Quadratic Formula:

-10-8-6-4-2246810-20-1010203040-2.002.00

x=bb24ac2ax = frac{-b pm sqrt{b^2 – 4ac}}{2a}x=2abb24ac

For the equation:

  • a=2a = 2a=2
  • b=4b = -4b=4
  • c=6c = -6c=6

Step 1: Substitute values

x=(4)(4)24(2)(6)2(2)x = frac{-(-4) pm sqrt{(-4)^2 – 4(2)(-6)}}{2(2)}x=2(2)(4)(4)24(2)(6)


Step 2: Simplify

x=416+484x = frac{4 pm sqrt{16 + 48}}{4}x=4416+48

x=4644x = frac{4 pm sqrt{64}}{4}x=4464


Step 3: Final calculation

x=484x = frac{4 pm 8}{4}x=448

So:

  • x=4+84=3x = frac{4 + 8}{4} = 3x=44+8=3
  • x=484=1x = frac{4 – 8}{4} = -1x=448=1

Final Answer

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

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