Question

sqrt{12+x}-sqrt{1-x}=1

Answer 1

√(12+x)-√(1-x)=1
ОДЗ
12+x≥0⇒x≥-12
1-x≥0⇒x≤1
x∈[-12;1]
12+x-2√(12-11x-x²)+1-x=1
2√(12-11x-x²)=12
√(12-11x-x²)=6
12-11x-x²=36
x²+11x+24=0
x1+x2=-11 U x1*x2=24
x1=-8
x2=-3