3х^2 + 7х - 10 = 0
D = b^2 - 4ac
D = 7^2 - 4 × 3 × (-10) = 49 + 120 = 169
x = (- b ± √D)/2a
x = (- 7 ± √169)/(2 * 3) = (- 7 ± 13)/6 = 1; - 20/6 = - 3 1/3
3х^2 + 7х - 10 = 0
D = b^2 - 4ac
D = 7^2 - 4 × 3 × (-10) = 49 + 120 = 169
x = (- b ± √D)/2a
x = (- 7 ± √169)/(2 * 3) = (- 7 ± 13)/6 = 1; - 20/6 = - 3 1/3