a)(2x+1)(2x-1)<(2x-1)² b)(3-x)²≤ 2-x(5-x)

a)(2x+1)(2x-1)<(2x-1)² 4x²-1<4x²-4x+1 4x²-4x²+4x < 1+1 4x< 2 |:4 x<½ b)(3-x)²≤ 2-x(5-x) 9-6x+x² ≤ 2 -5x+x² -6x+x²+5x-x² ≤ 2-9 -x≤ -7 x≥ 7 proszę;]