Question

4x²-16x+7=0 me ajudar pofavor
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Answer 1

Explicação passo-a-passo:

4x²16x +7=0

a = 4

b = -16

C = 7

X = -(-16) ± √(-16)² - 4.4.7

2.4

Answer 2

4x²-16x+7=0
a= 4; b = - 16; c= 7
∆= b^2 - 4ac
∆ = (-16)^2 -4.4.7
∆=256-28.4
∆= 256-112
∆= 144
X =[ - b +/- √∆]/2a
x = [-(-16) +/- √144]/2.4
x = (16+/- 12)/8
X'=(16-12)/8= 4/8(:4)/(:4)
X' =1/2

X"= (16+12)/8= 28/8(:4)/(:4)
X"= 7/2

R.:
S= {7/2; 1/2}