Question

Resolva as equações
a) x²-90=31
b)5x²+4=49
c)4x²+27=x²
d)2x²+11x²+12
e)5(x²-1)=4(x²+1)
f)x(x+2)=2x+25

Answer 1

a)=11
b)=3
c)=3
d)=?
e)=3
f)=5