Tìm x,biết

a)\(\left(x-2^2\right)-1=0\)

b)\(4-\left(x-2\right)^2=0\)

c)\(x^2-9-\dfrac{8}{9}x^2=0\)

d)\(\left(3x-2\right)^2-\left(2x+3\right)^2=5\left(x+4\right)\left(x-4\right)\)