Упростите 1) 2) x+ если x<11<br> 3) 4)
1 (√x-4)(√x+4)/(√x-4) -(√x-3)(√x+3)/√(√x-3)=√x+4-√x-3=1 2 x+|x-11|=x+11-x=11 3 (√-x -13)(√x+13)/(√-x+13)=√-x-13 4 (√x+1)(√x-7)/(√x+1) =7=√x-7+7=√x x-6√x-7 √x=a a²-6a-7=0 a1+a2=6 U a1*a2=-7 a1=-1 U a2=7 √x=-1 U √x=7