Question

Rezolvati ecuatia (x+3)^2 -(x+1)(x+2)=(x-5)(x+5)-(x^2+1)

Answer 1

(x+3)² -(x+1)(x+2) = (x-5)(x+5)-(x²+1)

x² + 6 x + 9 - ( x² + x + 2 x + 2) = x² - 5 x + 5 x - 25 - x² - 1

x² + 6 x + 9 - x² - 3 x - 2 = - 25 - 1

3 x = - 26 - 7 

3 x = - 33 

x = ( - 33) : 3 

x = - 11