Question

-3(4+5m-6n) ? 12-15m+18n

Answer 1

$-3(4+5m-6n)=-12-15m+18n$

Поскольку 12 больше - 12,то и сума с 12 больше сумы с -12.

Ответ:-3(4+5m-6n)<12-15m+18n

Answer 2

Let's simplify the expression -3(4+5m-6n):

-3(4+5m-6n) = -34 - 35m + 3*6n

Now, multiply each term inside the parentheses by -3:

-12 - 15m + 18n

So, the simplified expression is -12 - 15m + 18n, which is indeed equal to 12 - 15m + 18n when you change the signs of all the terms.