Объяснение:
[tex]b {}^{3} + 18b {}^{2} + 81b = b(b {}^{2} + 18b + 81) = (b + 9) {}^{2} = b(b + 9) {}^{2} [/tex]
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Объяснение:
[tex]b {}^{3} + 18b {}^{2} + 81b = b(b {}^{2} + 18b + 81) = (b + 9) {}^{2} = b(b + 9) {}^{2} [/tex]