## anonymous 5 years ago SOLVE BY QUADRATIC FORMULA: X^2-5X=7

1. Owlfred

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2. anonymous

?? wher is second equetion?

3. Mohsen

$-b \pm \sqrt{b ^{2}-4ac}/2a$ a=1, b=-5, c=-7

4. Mohsen

$-5\pm \sqrt{(-5)^{2}-4(1)(-7)}/2(1)$ $-5\pm \sqrt{25+28}/2$ $-5\pm \sqrt{53}/2$ $i) -5+\sqrt{53}/2$ = find yourself! $ii) -5-\sqrt{53}/2$ = find yourself!