What is the answer to |2x^2-x-1|=0 ?

The answer to |2x^2-x-1|=0 is x=-1/2 \lor x=1

Solve for x: |2x^2-x-1|=0

The solution is x=-1/2 \lor x=1

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2 x^{2} - x - 1 = 0

x = - \frac{1}{2} or x = 1

Decimal Notation

x = - 0.5, x = 1

Solution steps

2 x^{2} - x - 1 = 0

Apply absolute rule: If

∣ u ∣ = 0

then

u = 0

2 x^{2} - x - 1 = 0

2 x^{2} - x - 1 = 0 : x = 1, x = - \frac{1}{2}

x = - \frac{1}{2} or x = 1

2 ∣ x ∣ + 7 = 6

∣ 3 t - 1 ∣ = 10

6 = ∣ - 6 p ∣

∣ 2 x + 1 ∣ - 10 = - 3

\frac{∣ 5 - 9 x ∣}{3} = 2

What is the answer to |2x^2-x-1|=0 ?
The answer to |2x^2-x-1|=0 is x=-1/2 \lor x=1
Solve for x: |2x^2-x-1|=0
The solution is x=-1/2 \lor x=1