Question

преобразуй в многочлен

1 (x-3)(x+3)-x(x-5)

2.(m-5)^2-(m-4)(m+4)

Answer 1

( x - 3 )( x + 3 ) - x(x - 5 ) = x² - 9 - x² + 5x = 5x - 9 
( m - 5 )² - ( m - 4 )( m + 4 ) = m² - 10m + 25 - m² + 16 = 41 - 10m