The problem asks us to solve the quadratic equation $2x^2 - x - 3 = 0$ using the quadratic formula.

AlgebraQuadratic EquationsQuadratic FormulaSolving Equations
2025/4/15

1. Problem Description

The problem asks us to solve the quadratic equation 2x2x3=02x^2 - x - 3 = 0 using the quadratic formula.

2. Solution Steps

The quadratic formula is given by:
x=b±b24ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}
where aa, bb, and cc are the coefficients of the quadratic equation ax2+bx+c=0ax^2 + bx + c = 0.
In our case, a=2a = 2, b=1b = -1, and c=3c = -3.
Substituting these values into the quadratic formula, we get:
x=(1)±(1)24(2)(3)2(2)x = \frac{-(-1) \pm \sqrt{(-1)^2 - 4(2)(-3)}}{2(2)}
x=1±1+244x = \frac{1 \pm \sqrt{1 + 24}}{4}
x=1±254x = \frac{1 \pm \sqrt{25}}{4}
x=1±54x = \frac{1 \pm 5}{4}
So we have two possible solutions:
x1=1+54=64=32x_1 = \frac{1 + 5}{4} = \frac{6}{4} = \frac{3}{2}
x2=154=44=1x_2 = \frac{1 - 5}{4} = \frac{-4}{4} = -1
Therefore, the solutions are x=32x = \frac{3}{2} and x=1x = -1.

3. Final Answer

32,1\frac{3}{2}, -1

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