Question

Preciso de uma ajuda em Bhaskara.x2-3x-4=0

Answer 1

$delta=9-4.1.(-4)=25$
$x= \frac{3+/- \sqrt{25} }{2}$
$x'= \frac{3+5}{2} =4$
$x''= \frac{3-5}{2} = -1$

Answer 2

x2-3x-4=0
delta= b2-4.a.c
delta= (-3)2-4.1.(-4)
delta= 9 + 16
delta= 25

x= -b +/- raiz de delta
_________________
2.a
x= -(-3)+/- raiz de 25
______________
2.1
x'= 3+5
------ = 8/2 = 4
2
x"= 3-5
------- = -2/2 = -1
2