Question

Сократите дробь 1) 14а^2b^4(a+b)^2/28a^3b(a+b)
2) c^2-1 /1-c

Answer 1

$1) \frac{ 14a {}^{2}b {}^{4}(a + b) {}^{2} }{28a {}^{3}b(a + b) } = \frac{b {}^{3} (a + b)}{2a} = \frac{ab {}^{3} + b {}^{4} }{2a} \\ \\ 2) \frac{c {}^{2} - 1}{1 - c} = \frac{(c - 1)(c + 1)}{(1 - c)} = - (c + 1) = - c - 1$

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