delawdermia27
23.08.2019 •
Mathematics
The function f(x) = 2x2 + 3x + 5, when evaluated, gives a value of 19. what is the function’s input value? .
a 1.
b -1.
c 2.
d -2.
e -3
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Ответ:
2 x² + 3 x - 14 = 0
x 1/2 = (-3 +/- √ (9 + 112 ) )/4 = (-3+/-11)/4
x 1 = 2
x 2 = -7/2
C ) 2
Ответ: