(х-5)(х+5)-x(x+3)<x+1
(х-5)(х+5)-x(x+3)х²-25-х²-3х <х+1<br>-25-3х<х+1<br>-4х<26<br>х>-26/4 х>-13/2 х>-6,5
X²-25-x²-3x-x<1<br>-4x<26<br>x>-6,5