Question

i need to use the quadratic formula to solve xsquared-4x-7=0

Answer 1

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

Answer 2

easier to complete the square because middle term is even
\[x^2-4x=7\]
\[(x-2)^2=7+4=11\]

\[x-2=\pm\sqrt{11}\]
\[x=2\pm\sqrt{11}\]

Answer 3

thanks