Решите уравнения: 1. x^2=8x-17 2. 14x=-49-x^2 3. 36+17x=-2x^2…

x^2=8x-17 x^2-8x+17=0Д=(-8) ^2-4*17=64-68 <0 14x=-49-x^2X^2+14x+49=0D=14^2-4*49=196-196=0x=-14/2=-7 36+17x=-2x^22x^2+17x+36=0D=17^2-4*2*36=289-288=1x1=-17+1/4=-16/4=-4x2=-17-1/4=-18/4 7x^2-3x=47x^2-3x-4=0D=-3^2+4*7*4=9+112=121=11^2x1=3+11/14=1x2=3-11/14=-8/14 0,81-x^2=0-x^2=-0,81x^2=0,81x=+-0,9 5x+9x^2=09x^2+5x=0x (9x+5)=0x=0 9x=-5 x=-5/9 1+2x=8x^2-8x^2+2x+1=0D=2^2+4*8=4+32=36=6^2x1=-2+6/-16=-1/4x2=-2-6/-16=1/2 19x-6x^2-10=0-6x^2+19x-10=0D=19^2-4*6*10=361-240=121=11^2x1=-19+11/-12=-8/-12=2/3x2=-19-11/-12=2,5 8+2x^2=0 2x^2=-8x^2=-4 нет корней 40x-25-16x^2=0 -16x^2+40x-25=0D=40^2-4*16*25=1600-1600=0x=-40/-32=10/8=5/4 -36-x^2=-12x-x^2+12x-36=0D=12^2-4*36=144144=0x=-12/-2=6