Question

Упростите выражение
А)(4с-3)(2-5с)+20с^2
б)(х-2у)(х+2у)-(х+1)(х-3)
в)6х^3-(х-3у)(5+6х^2)

Answer 1

Ответ:

$8c - 20c - 6 + 15c + {20c}^{2} = {20c}^{2} - 5c - 6$

${x}^{2} - {4y}^{2} - {x}^{2} + 2x + 3 = - {4y}^{2} + 2x + 3$

${6x}^{3} - 5 x - {6x}^{3} + 15y + {18x}^{2} y = {18x}^{2} y + - 5x + 15y$