Question

b)-2x-4=0

e)x2-2x+1=0

f)-x2-6-9=0

g)-3x2-2x+1=0 *o X é elevado a 2

h)x2+2x+2=0

Answer 1

b)-2×=4
×=4/2
×=2

e)×=1
f)-2×=15
×=15/2
×=7,5
g