Question

(5-х) (х-3)<0 помогите пж

Answer 1

(5-x)(x-3)<0
5*x-5*3-x*x+3*x<0
5x-15-x²+3x<0
-x²+8x-15<0
x²-8x+15>0
x1>3
x2>5
⊂-∞,3⊃∪⊂5,+∞⊃