1) 1 - 16y^2 = 0 - 16y^2 = - 1 16y^2 = 1y^2 = 1/16y = ± √(1/16)y = ± 1/42)- y^2 + 8 = 0 - y^2 = - 8 y^2 = 8 y = ± √8y = ± 2√23)x^2 - 8x + 15=0D = 64 - 4*15 = 4x1 = ( 8 + 2)/2 = 10/2 = 5;x2 = ( 8 - 2)/2 = 6/2 = 3;4)2x^2 + 3 x + 1 = 0D = 9 - 4*2 = 1 x1 = ( - 3 + 1)/4 = - 2/4 = - 1/2;x2 = ( - 3 - 1)/4 = - 4/4 = - 1 наиб - 1/25) 4x^2 - 7x + 3 = 0D = 49 - 4*4*3 = 49 - 16*3 = 1x1 = ( 7 + 1)/8 = 1x2 = ( 7 - 1)/8 = 6/8 = 3/4 6)x^2 - 17x + 42 = 0D = 289 - 4*42 = 121x1 = ( 17 + 11)/2 = 14x2 = ( 17 - 11)/2 = 3x1 + x2 = 17 7) условие ошибка ??8) x^2 + 9x = - 14 x^2 + 9x + 14 = 0 (x + 7) * (x + 2) = 0 x = - 7x = - 2 x1 * x2 = 149)1+4y=5y^2 5y^2 - 4y - 1 = 0 D = 16 + 20 = 36y1 = ( 4 + 6)/10 = 1y2 = ( 4 - 6)/10 = - 2/10 = - 1/5 10) (x+3)^2-16=(1-2x)^2x^2 + 6x + 9 - 16 = 4x^2 - 4x + 1 x^2 + 6x - 7 = 4x^2 - 4x + 1x^2 - 4x^2 + 6x + 4x - 7 - 1 = 0 - 3x^2 + 10x - 8 = 0 3x^2 - 10x + 8 = 0 D = 100 - 96 = 4x1 = ( 10 +2)/6 = 2 x2 = ( 10 - 2)/6 = 8/6 = 4/3