4x²-3x-1=0 c решение

Question

4x²-3x-1=0 c решение

Answer 1

4x^2-3x-1=0
a= 4;b= -3; c = -1
D= b^2-4ac= (-3^2)-4×4×(-1) = 9 - 16 × (-1) = 9+16 =25
√D=√25 =5
X1 = -b+√D/2 = 3+5/2 = 4
X2= -b+√D/2 = 3-5/2 = -1
Ответ: -1 и 4.