Question

use the quadratic formula to find any x-intercepts on the graph of the equation.

y=5x^2+6x-6

Answer 1

so far I have \[\frac{ -6\pm \sqrt{156} }{ 10 }\]

Answer 2

156 = 2x2x3x13
Simplify the radical using that information.

Answer 3

thats where I am getting stuck..

Answer 4

\[\sqrt{156}=\sqrt{2\times2 \times3\times13}=\sqrt{4\times3\times13}=\sqrt{4}\sqrt{3}\sqrt{13}\]

Answer 5

\[\sqrt{4}\sqrt{3}\sqrt{13}=2\sqrt{3}\sqrt{13}=2\sqrt{39}\]

Answer 6

Now I understand! thank you so much for you help and patience. @Mertsj

Answer 7

yw