Question

O Vertice Da Parabola y=2x2 - 4x + 5 E O Ponto:

(A) (2,5) (B) (1, -3) (C) (-1,11) (D)3,1) (E) (1,3)

Answer 1

a = 2     b = - 4    c = 5
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Xv = -b/2a
Xv = -(-4)/2.2
Xv = 4 / 4
Xv = 1
===========================
Yv = - Δ / 4a
Yv = - (b² - 4ac ) / 4a
Yv = - (16 - 4.2.5 ) / 4.2
Yv = - (16 - 40) / 8
Yv = - ( - 24) / 8
Yv = 24 / 8
Yv = 3
===========================
ALTERNATIVA E (1 , 3)