gaelle90701
04.07.2019 •
Mathematics
Using the quadratic formula, which of the following is the solution to the quadratic equation 2x2 + 3x - 5 = 0? a. x = - 5/2 x = -1 b. x = - 5/2, x = 1 c. x = 5/2, x = 1 d. x = 5/2, x = -1
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Ответ:
B
Step-by-step explanation:
x1,2 = -3±√9+40 / 4 = -3±7 / 4 => x1 = -3-7 / 4 = -10/4 = -5/2
x2 = 7-3 / 4 = 4/4 = 1
Ответ: