Question

решите 142 и 149 пожалуйста:3

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Answer 1

142.

$(frac{c}{b-c}-frac{c}{b}):frac{c^2}{b^2};\(frac{bc-c(b-c)}{b(b-c)})*frac{b^2}{c^2};\frac{c(-b+c+b)}{b(b-c)}*frac{b^2}{c^2};\frac{c^2*b^2}{b(b-c)*c^2};\frac{b}{b-c}\1-b/c$

149.

$frac{x}{a}-frac{x^2-a^2}{a^2}*frac{a}{x+a};\frac{x}{a}-frac{(x+a)(x-a)}{a(x+a)};\frac{x}{a}-frac{x-a}{a}\frac{x-x+a}{a}\a/a\1$