40 pontos ..

1°) Classifique as retas abaixo em Paralelas , Concorrentes e Perpendiculares:

a) r1 : 3x + y + 3 = 0
r2 : x + y + 3 = 0


b) r1 : x - y + 3 = 0
r2 : x + y + 4 = 0

Com caóculos e explicação..​
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