Question

If $x^4-29x^2+100=0$, then $x=\pm 7,\pm 4$

• A. Yes
• B. No
• C. Ambiguous
• D. Data insufficient

Answer 1

The correct option is B No

Given equation is:

$x^4-29x^2+100=0$
$x^4-25x^2-4x^2+100=0$
$(x^2-25)(x^2-4)=0$
$x^2=25,4$
Hence,$x=\pm 5,\pm 2$