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(4x+2)(4x-2)=(4x-2)²
16x²-4=16x²-16x+4
16x=4+4
16x=8
x=1/2
2.
(5-3x)(5+3x)=(5+3x)²
25-9x²=25+30x+9x²
-9x²-9x²-30x=0
-18x²-30x=0
-6x(3x+5)=0
x=0 v 3x+5=0
x=0 v x=-5/3
3.
(2x-1)²-(2x-1)(2x+1)=0
4x²-4x+1-(4x²-1)=0
4x²-4x+1-4x²+1=0
4x=2
x=1/2