Advanced MathEasy–MediumPositive solution of a factored equation
Advanced Math practice question
If (x + 4)(2x − 1) = 0 and x > 0, what is the value of x?
Answer: 1/2 or .5 or 0.5
Either x + 4 = 0 or 2x − 1 = 0. The positive solution is x = 1/2.
Common wrong answers
- If you answered 1
- 1 forgets to divide by 2.
- If you answered 2
- 2 inverts 1/2.
- If you answered -4
- −4 is the negative solution.
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