Question

descompuneti in factori (x+radical din 2 ) totul la 2 -8

Answer 1

$(x+ \sqrt{2} )^2-8= (x+ \sqrt{2} )^2-2 \sqrt{2} = \\ =(x+ \sqrt{2} -2 \sqrt{2} )(x+ \sqrt{2} +2 \sqrt{2} )=(x- \sqrt{2} )(x+3 \sqrt{2} )$