ПОМОГИТЕ, ПОЖАЛУЙСТА. Разложите на множители (m + 10)^2 − (n − 12)^2; (с + 19d)^2 − (19с + d)^2.. Created by miliolia125. algebra-ru

ПОМОГИТЕ, ПОЖАЛУЙСТА. Разложите на множители (m + 10)^2 − (n − 12)^2; (с + 19d...

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$1)\; \; (m+10)^2-(n-12)^2=\\\\\star \; \; A^2-B^2=(A-B)(A+B)\; \; \star \\\\=\Big (m+10-(n-12)\Big )\cdot \Big (m+10+(n-12)\Big )=\\\\=(m-n+22)\cdot (m+n-2)\\\\\\2)\; \; (c+19d)^2-(19c+d)^2=\\\\=\Big (c+19d-(19c+d)\Big )\cdot \Big (c+19d+(19c+d)\Big )=\\\\=(18d-18c)\cdot (20c+20d)$

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