\[\boxed{\text{709.}\text{\ }еуроки - ответы\ на\ пятёрку}\]
Пояснение.
Решение.
\[\boxed{\text{709\ (709).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[\textbf{а)}\ mx + my + 6x + 6y =\]
\[= (mx + my) + (6x + 6y) =\]
\[= m(x + y) + 6 \cdot (x + y) =\]
\[= (x + y)(m + 6)\]
\[\textbf{б)}\ 9x + ay + 9y + ax =\]
\[= (9a + 9y) + (ay + ax) =\]
\[= 9 \cdot (x + y) + a(x + y) =\]
\[= (x + y)(9 + a)\]
\[\textbf{в)}7a - 7b + an - bn =\]
\[= (7a - 7b) + (an - bn) =\]
\[= 7 \cdot (a - b) + n(a - b) =\]
\[= (a - b)(7 + n)\]
\[\textbf{г)}\ ax + ay - x - y =\]
\[= (ax + ay) - 1 \cdot (x + y) =\]
\[= a(x + y) - (x + y) =\]
\[= (x + y)(a - 1)\]
\[\textbf{д)}\ 1 - bx - x + b =\]
\[= (1 - x) + (b - bx) =\]
\[= (1 - x) + b(1 - x) =\]
\[= (1 - x)(1 + b)\]
\[\textbf{е)}\ xy + 2y - 2x - 4 =\]
\[= (xy + 2y) - (2x + 4) =\]
\[= y(x + 2) - 2 \cdot (x + 2) =\]
\[= (x + 2)(y - 2)\]