SOLUTION: I am stuck... this is a quad root problem {{{ 4sqrt(4-5x^2)=x }}} I tried {{{ 4-5x^2=x^4 }}} {{{ x=sqrt4-x^4/5 }}} Thanks

Question 752094: I am stuck... this is a quad root problem

I tried

Thanks
Found 2 solutions by josgarithmetic, ankor@dixie-net.com:
Answer by josgarithmetic(39630) (Show Source): You can put this solution on YOUR website!

Square both sides.

Distribute the multiplication by 16.

continuing,...

or
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!

I tried
:
right here you can rearrange it as a quadratic equation
0 = x^4 + 5x^2 - 4
Solve for x^2 using the quadratic formula, then find x, check the
solutions in the original equation, Only 1 solution works x ~ .8376

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