Представьте выражение в виде многочлена, используя формулу разности квадратов.
((2c+[tex]d)^{2} [/tex]-[tex] - (c+2d)^{2})*3cd [/tex]
((2c+[tex]d)^{2} [/tex]-[tex] - (c+2d)^{2})*3cd [/tex]
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Answers & Comments
= (c - d) (3c+3d) * 3cd = (c - d)(c + d)*9cd = (c²-d²)*9cd =
9c³d - 9cd³
2c - c = c, d - 2d = -d (первая скобка)
2c + c = 3c , d + 2d = 3d (вторая скобка)