Question

2x la a 2 - 1 = 1 - 2x la a 2

Answer 1

2x²-1=1-2x²
2x²+2x²=1+1
4x²=2
4x²-2=0

Answer 2

$2 x^{2} -1=1- 2x^{2} =>-4 x^{2}= -2=>4 x^{2} =2=> x^{2} =0,5=>x= \sqrt{0,5}$