Question 912800
{{{-7(x^2-10)^2-6=-258}}}


{{{-7(x^2-10)^2=-258+6}}}


{{{(x^2-10)^2=(-258+6)/-7}}}


{{{(x^2-10)^2=(-252)/-7}}}


{{{(x^2-10)^2=36}}}


{{{x^2-10) = +/- 6}}}


x^2= 10-6 =4
x=+/-2

OR

x^2-10=6

x^2=16
x= +/- 4