Practice question: completing the square method

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Solve the following quadratic equation by completing the square method. x ^2+2x−5=0

By using the method of completing the square, show that the equation 4x^2+3x+5=0 has no real roots.

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Find the roots of the equation 5x^2-6x-2=0 by the method of completing the square.

Find the roots of 4x^2+3x+5=0 by the method of completing the square.

Find the roots of the equation 5x^2-6x-2=0 by the method of completing the square.