resolva as seguintes equações do 2° grau sem a utilização do delta

A)x²- 49 = 0
B)x²= 1
C)2x²-50=0
D)7x²-7=0
E)5x²-15=0
F)x²-7x=0
G)x²+5x=0
H)4x²-9x=0
I )3x²+5x=0
J)4x²-12x=0
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