Odgovor: x=4 x=−10 Pojasnilo: x2+6x=40 ali x2+2(x)(3)+9=40+9 ali x2+2(x)(3)+32=49 ali (x+3)2=72 ali # x + 3 = + - 7 ali x=−3+−7 x=−3+7 x=4======== Ans 1 ali x=−3−7 x=−10======= Ans 2
