Question

qua a resoluçaõ de x² - 3x -4=0

Answer 1

a=1, b=-3 e c=-4
delta=9-4*1*(-4)
delta=9+16
delta=25
x=(3+-5)2
x1=8/2=4
x2=-2/2=-1

espero ter ajudado, bjs!

Answer 2

$x^{2} - 3x -4=0= \Delta= b^{2} -4.a.c= \Delta= -3^{2} -4.1.(-4)= \Delta=9+16=25  x^{1} =-(-3)-+ \sqrt{25} /2=3+5/2=-8/2=4  x^{2} =-(-3)-+ \sqrt{25} /2=3-5/2=2/2=-1$


S{4,-1}


Espero ter ajudado