X²=81x=√81=±9x=9; x=-9X²=0,09x=√0.09=±0.3x=0.3; x=-0.3x²=6x=√6; x=-√6x²=1/64x=√1/64=±1/8x=1/8; x=-1/8144-x²=0-x²=-144 |÷(-1)x²=144x=√144=±12x=12; x=-124x-x²=0x•(4-x) =0X=04-x=0-x=-4 |÷(-1)x=42x²-8=02x²=8 |÷2x²=4x=√4=±2x=2; x=-2x²-5x=0x•(x-5)=0x=0x-5=0x=5x²=1,69x=√1,69=±1,3x=1,3; x=-1,3x²=6,25x=√6,25=±2,5x=2,5; x=-2,50,1x-x²=0x•(0,1-x) =0x=00,1-x=0-x=-0,1 |÷(-1)x=0,11/3x²-x=0x•(1/3x-1)=0X=01/3x-1=01/3x=1 |•3X=3???????? 4-2x²=6???? -2x²=6-4???? -2x²=2 |÷(-2)????? x²=-1???????????? ???????? 36x²-12x=012x•(3x-1)=0x=03x-1=03x=1 |÷3X=1/3