Question

05. Determine a raiz das equações:
a) x2 - 5x + 6 = 0
b) 4x2 - 4x + 1 = 0
c) 2x2 + 3x + 4 = 0​

Answer 1

A)

$x^{2} - 5x + 6 = 0\\\\x^{2} -2x-3x + 6 = 0\\x.(x-2)-3x +6 = 0\\x.(x-2) -3 ( x-2) =0\\(x-2). (x-3) = 0 \\\\x-2 = 0\\x-2+x=0+2\\x=0+2\\x=2\\\\x-3=0\\x-3+3=0+3\\x=0+3\\x=3\\\\x_{1} =2\\x_{2} =3$