Question

Решите неравенство:
(7-X)(x+7)-3x(x+2)<2(1-x)-5x-4X²+43 5/13

Answer 1

(7-X)(x+7)-3x(x+2)<2(1-x)-5x-4X²+43 5/13
49-x²-3x²-6x-2+2x+5x+4x²-43 5/13<0
x<-3 8/13
x∈(-∞;-3 8/13)