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√7x=14
x=
b)(x+2)(4x-1)=0
x+2=0 v 4x-1=0
x=-2 v 4x=1
x=2 v x=0,25
c)(x+3)()=0
x+3=0 v =0
x=-3 v x=1 bo √0=0
d) -2x(x+7)=0
-2x=0 v x+7=0
x=0 v x=-7
e)
x≠0 bo mianownik musi być różny od zera
czyli 4x+3=0
x=-3/4
x=-0,75
f)√5x-1=0
√5x=1
b.) x=-2 v x=1/4
c.) x = -3 v