resolva as equações do 2°grau :(coeficiente b=0)
a) x²–36=0
b) x²–16=0
c) x²–64=0
d) x²–25=0
e) x²–4=0
f) x²+36=0
g) x²–9=0
h) x²–1=0
i)4x²-21=0
j) 7x²-21=0
k) x²-49=0
l) x²-49=0
m) 5x²-20=0​