Question

Resolva as equações incompletas faltando c

a) x² - 3x=0

b) 5x² - 4x/6 = 0

c)2x²/5 + 3x/5 =0

d) 2x²-5x-6=2(x-3)

e) 5x²/3 + 2x= 0

f) 2x²-4x/5 =0

g) x²/5 - 6 x = 0

h) 2x² - 5 (x+6) = -2 (x+15)

i) 2x²-8x = 0

j) 5x² - 3x = 0

k) 2x² - 7 x = 0

l) 2x² /5 - 6 x = 0

m) 5x² /2 = 2 ( 2 x )

Answer 1

a) x²-3x=0
x(x-3)
x=0
x-3=0
x=3

b)5x²-4x/6 = 0
x(5x-4/6)
x=0
5x-4/6=0
5x=4/6
x=0,666.../5
x=1,333...

c)2x²/5 + 3x/5=0
x(2x/5 + 3/5)
x=0
2x/5 + 3/5=0
2x/5=-3/5
x= -3/5 /2/5
x=-0,6 /0,4
x=-1,5