## anonymous 5 years ago i need to use the quadratic formula to solve xsquared-4x-7=0

1. Owlfred

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2. anonymous

easier to complete the square because middle term is even $x^2-4x=7$ $(x-2)^2=7+4=11$ $x-2=\pm\sqrt{11}$ $x=2\pm\sqrt{11}$

3. anonymous

thanks