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Solve for all values of x by factoring. x, squared, minus, 8, x, plus, 15, equals, 0 x 2 −8x+15= 0

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Answer
x=3,x=5\boxed{x = 3, x = 5}

Substituting 33 into the original equation gives 9−24+15=09 - 24 + 15 = 0, and substituting 55 gives 25−40+15=025 - 40 + 15 = 0, confirming both solutions are correct.

Problem: Solve for xx in the equation x2−8x+15=0x^2 - 8x + 15 = 0 by factoring.

Steps

  1. Factor the quadratic expression (find two numbers that multiply to 1515 and add to −8-8)
    (x−3)(x−5)=0(x - 3)(x - 5) = 0
  2. Apply the Zero Product Property (set each factor equal to zero)
    x−3=0orx−5=0x - 3 = 0 \quad \text{or} \quad x - 5 = 0
  3. Solve for xx (add the constants to both sides)
    x=3orx=5x = 3 \quad \text{or} \quad x = 5

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