Question

1)Resolva as seguintes equações ,em R,se possivel :
a) -9x²+12x-4=0
b)3x²+4x+2=0
c)x²-8x-20=0
d)5x²-12x+4=0
e)4x²-40x=100
f)2x²+7x+5=0
g)x²=14-5x
h)x²+9=6x
i)-x²+8x=9=0
j)2x²+3x+11=0
k)25x²-10x+1=0

Answer 1

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