Question

2 - Dada a
Dada a função polinomial do 2º. grau f(x) = -2x² +7x -3, calcule:
a) f(3)
b) f(0)
c) f(-2)
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Answer 1

f(x) = -2x² +7x -3,

a) f(3) = -2.3² + 7.3 -3
-2.9 + 21 -3
- 18 +18 = 0

R= 0

b) f(0) = -2.0² +7.0 - 0
-2.1 + 0 -0 = -2

R= -2

c) f(-2) = -2.-2² + 7.-2 -3
-2.-4 + (-14 -3)
8 + (-17)
8 -17 = -9

R= -9