Question

СРОЧНО!!!!!УМОЛЯЯЯЯЁ

Answer 1

$( frac{b}{b^2-36}- frac{b-6}{b^2+6b} ): frac{2b-6}{b^2+6b} - frac{b}{b-6} =-1 \ \ 1) frac{b}{b^2-36}- frac{b-6}{b^2+6b} = frac{b}{(b-6)(b+6)} - frac{b-6}{b(b+6)} = frac{b^2}{b(b-6)(b+6)} - \ \ - frac{(b-6)(b-6)}{b(b-6)(b+6)} = frac{b^2-(b-6) ^{2} }{b(b-6)(b+6)} = frac{b^2-b^2-36+12b}{b(b-6)(b+6)} = frac{12b-36}{b(b-6)(b+6)} = \ \ = frac{12(b-3)}{b(b-6)(b+6)} \ \2) frac{12(b-3)*b(b+6)}{b(b-6)(b+6)*2(b-3)} = frac{6b}{b(b-6)} = frac{6}{b-6}$
$3) frac{6}{b-6} - frac{b}{b-6} = frac{6-b}{b-6} =- frac{b-6}{b-6} =-1$