Question

resolva as equações de 2° grau
a) x²-5x+6=0
b)x²-900=0
c)2x²-8x+8=0
d)x²-8x=0
me ajudemm​

Answer 1

a) x²-5x+6=0

-3, -2

( x - 3 ) ( x - 2 ) = 0

x - 3 = 0

x - 2 = 0

x - 3 = 0

x = 3

x - 2 = 0

x = 2

x = 3,2

b)x²-900=0

x² = 900

x = ±√900

x = ±√30²

x = ±30

x = 30

x = - 30

x = 30, -30

c)2x²-8x+8=0

2 ( x - 2 )² = 0

( x - 2 )² = 0

x - 2 = 0

x = 2

d)x²-8x=0

x ( x - 8 ) = 0

x = 0

x - 8 = 0

x = 0

x - 8 = 0

x = 8

x = 0.8

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