Question

(х – 3)·(х + 3) – (х – 5)2 спростіть вираз

Answer 1

Ответ:

$(x - 3)( x + 3) - (x - 5 {)}^{2} = {x}^{2} + 3x - 3x - 9 - ( { {x}^{2} - 10x + 25}^{} {)}^{} = {x}^{2} + 3x - 3x - 9 - {x}^{2} + 10x - 25 = 10x - 36$