Решите пожалуйста дам 100 балов 2)x^2+7x-30=0 3)6x^2-x-1=0 4)4x^2-4x-3=0 5)2x^2-x-6=0 6)3x^2+4x-4=0 7)2x^2-2x-4=0 Решите пожалуйста дам 100Балов

1) x = 3 и -10 по теореме виета2)  D = 1 + 24 = 25x= 1 + 5/12 = 0.5x = -4/12 = -1/33) 4x^2 - 4x -3=0D = 16 + 48 = 64x = 4 - 8 / 8 = -0.5x = 12/8 = 1.54) D = 1 + 48 = 49x = 1 - 7/ 4 = 1.5x = 8/4 = 25) D = 16 + 48 = 64x = -4-8 / 6 = -2x = 4/6 = 2/36) D = 4 + 32 = 36x = 8/4 = 2x=-4/4 = -1

2)x^2+7x-30=0x1+x2=-7 U x1*x2=-30x1=-10 U x2=3 3)6x^2-x-1=0D=1+24=25x1=(1-5)/12=-1/3x2=(1+5)/12=1/2 4)4x^2-4x-3=0D=16+48=64x1=(4-8)/8=-0,5x2=(4+8)/8=1,5 5)2x^2-x-6=0D=1+48=49x1=(1-7)/4=-1,5x2=(1+7)/4=2 6)3x^2+4x-4=0D=16+48=64x1=(-4-8)/6=-2x2=(-4+8)/6=2/3 7)2x^2-2x-4=0D=4+32=36x1=(2-6)/4=-1x2=(2+6)/4=2