Question

Quais a raízes de x^2-3x-4=0?​

Answer 1

x^2-3x-4=0

-b/c = 3/-4 = 4-1/4•-1 ==> S:{-1, 4} ✓

Answer 2

espero ter ajudado

x2−3x−4=0

(1)⋅x2+(−3)⋅x+(−4)=0

x=−(−3)±(−3)2−4⋅(−4)−−−−−−−−−−−−−−−√2

x=3±9−(−16)−−−−−−−−−√2

x=3±25−−√2

x=3±(5)2

x1=82=(2)⋅(4)(2)=4

x2=−22=(2)⋅(−1)(2)=−1