Question

resposta p issoooooooo

Answer 1

1)

x²-x-12=0

x'=[1+√(1+48)]/2= (1+7)/2=4

x''=[1-√(1+48)]/2= (1-7)/2=-3

2)

x²-3x-4=0

x'=[3+√(9+16)]/2=[3+5]/2=4

x''=[3-√(9+16)]/2=[3-5]/2=-1

3)

6²=4²+c²

c²= 36-16

c²=20

c=√(5*2²)

c=2√5