Question

спростіть вираз 1) -2(x -4) -3(2x+3) 4m²-(5m²-9mn)+(-3m²+4mn)​

Answer 1

Ответ:

$- 2(x - 4) - 3(2x + 3) = - 2x + 8 - 6x - 9 = - 8x - 1$

$4 {m}^{2} - (5 {m}^{2} - 9mn) + ( - 3 {m}^{2} + 4mn) = \\ 4 {m}^{2} - 5 {m}^{2} + 9mn- 3 {m}^{2} + 4mn= \\ - 4 {m}^{2} + 13mn = - m(4m - 13n)$