уравнение - (x+5)(x-4)-x^2+18=0

Question

уравнение - (x+5)(x-4)-x^2+18=0

Answer 1

x^2 + 5x - 4x -20 - x^2 +18 = 0

 

x - 2 = 0

 

x=2

Answer 2

x^2-4x+5x-20-x^2+18=0

x-2=0

x=2