3x квадрат -75=0
3x^2=75
x^2=25
x=5
-x2 + 2x + 8 = 0D = b2 - 4acD = 4 + 32 = 36 = 6^2
x1,2 = -b ± √D/2ax1 = -2 + 6/-2 = - 4/2 = -2x2 = -2 - 6/-2 = 8/2 = 4ответ: x1 = -2; x2 = 4
3x квадрат -75=0
3x^2=75
x^2=25
x=5
-x2 + 2x + 8 = 0
D = b2 - 4ac
D = 4 + 32 = 36 = 6^2
x1,2 = -b ± √D/2a
x1 = -2 + 6/-2 = - 4/2 = -2
x2 = -2 - 6/-2 = 8/2 = 4
ответ: x1 = -2; x2 = 4