$0 = - x^{2} + 2 x + 3$

Answer

$x_{1} = - 1 x_{2} = 3$

Explanation

0 0 + x^{2} - 2 x - 3 x^{2} - 2 x - 3 = - x^{2} + 2 x + 3 = 0 = 0 move all terms to the left hand side simplify left side

$x^{2} - 2 x - 3 = 0$ is a quadratic equation.

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0=−x2+2x+3

x1​=−1​x2​=3​

$0 = - x^{2} + 2 x + 3$

$x_{1} = - 1 x_{2} = 3$