Question

Determine o valor da expressão 3x² -5x-1 quando:
A) X=0
B)X=1
C)X=5

Answer 1

VN = 3x² - 5x - 1
VN = 3 .0² - 5 . 0 - 1
VN = 3 . 0 - 0 - 1
VN = 0 - 0 - 1
VN = - 1
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Vn = 3x² - 5x - 1
VN = 3 . 1² - 5 . 1 - 1
VN = 3 . 1 - 5 - 1
VN = 3 - 5 - 1
VN = 3 - 6
VN = - 3
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VN = 3x² - 5x - 1
VN = 3 .5² - 5 . 5 - 1
VN = 3 . 25 - 25 - 1
VN = 75 - 25 - 1
VN = 50 - 1
VN = 49