1) 3√2·x+7=0 ⇒ 3√2·x = - 7 ⇒ x=-7/(3√2)2) 16x-3(x+1)=5x 16x - 3x - 3 = 5x 16x - 3x - 5x = 3, 8x = 3 x = 3/8 x = 0,375 3) 2.5(x-4)-6x=3-x, 2,5x - 10 - 6 x+ x = 3, -2,5 x = 10 + 3, -2,5x = 13 x= -5,2 4) x²-3x-10=0 D= (-3)²-4·(-10)=49=7² x=(3-7)/2=-2 или х=(3+7)/2=5 5) 2x²+7x-8=0 D= 7²-4·2·(-8)=49+64=113 x=(-7-√113)/4 или х=(-7+√113)/4 6) -х²+10x+2=0 D= 10²-4·(-1)·2 = 100 + 8 =108=(6√3)² x=(-10-6√3)/(-2) =5+3√3 или х=(-10+6√3)/(-2)=5-3√3