Question

Resolva as equações. a) X²-5x-6=0 b) 9x²-6x+1=0 c) X²+4x+4=0 d) x²+2x+7=0 por favor mim ajuda

Answer 1

a)-(-5)+-Raiz de 1/2•1
5+-Raiz de 1/2
X1=6/2=3
X2=4/2=2

b) -(-6) +- Raiz de -1/2*9
6+- Raiz de -1/18
X1=7/18= 0.38 ou 38/10
X2=3/10 Raiz de -1

c)-4+- Raiz de 0/ 2•1
-4+-0/2
X1=-2
X2= -2

d) -2+-Raiz de -24/2•1
X1= -1 Raiz de 24
X2= -1 Raiz de 24