Question

solve each equation by completing the square: x^2-2x=3​

Answer 1

Answer

3, -1

Step by Step solution

By applying the formula :-

$\frac{ - b \: + \: \sqrt{b {}^{2} \: - \: 4ac } }{2a} and \frac{ - b \: - \: \sqrt{b {}^{2} \: - \: 4ac } }{2a}$

Here - a = 1, b = -2 and c = -3

2 + √{4 - ( - 12 )} / 2 and 2 - √{4 - ( - 12 )} / 2

= 2 + 4 / 2 and 2 - 4 /2

= 6/2 and -2 / 2

= 3 and -1

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