x² + ______ x + 2 =0

x² + 4x = ______

x² + 4x + ________ = - 2 + 4

(x² + 2) ² = 2
[tex] \sqrt{(x2 {}^{2} } ) {}^{2} \: = \: \sqrt{ } [/tex]





fill the blank po yan ​