Y=√((x²-4)x)
(x²-4)x≥0
a)(x²-4)≥ 0 ∧ x≥0
x²≥4 ∧ x≥0
x≥2
x∈/2,∞)
b)(x²-4)≤0 ∧ x≤0
x²≤4 ∧ x≤0
x∈/-2,2/ ∧ x≤0
x∈/-2,0/
Otvet: x∈/-2,0/ ∪ x∈/2,∞)
2x-12=-34
2x=-34+12
2x=-22
X=11
5x^2+4x-1=0
D=16+20=36=6^2
x1=-4-6/10=-10/10=-1
x2=-4+6/10=2/10=1/5
<span>-20sin1°/ sin359°=-</span>20sin(360-359)/ sin359°=-20sin<span><span>359°</span>/ sin359°</span>=-20