Question

Срочно упростите выражение

Answer 1

(√6 + √3) *√12    - 2√6 * √3   = 
= √(6²*2 ) + √36   - 2√(3²*2) =
= 6√2  + 6  -  6√2  =  6

$( frac{6}{y^2-9} + frac{1}{3-y} ) * frac{y^2 + 6y + 9}{5} = \ \ = ( frac{6}{(y-3)(y+3)} - frac{1}{y-3} ) * frac{y^2+2*3y+3^2}{5} = \ \ = frac{6-(y+3)}{(y-3)(y+3)} * frac{(y+3)^2}{5} = frac{6-y-3}{(y-3)(y+3)} * frac{(y+3)^2}{5}= \ \ = frac{-(y-3)*(y+3)^2}{(y-3)(y+3)*5} = frac{-(y+3)}{5} = - frac{y+3}{5} = \ \ = - frac{1}{5} *(y+3) = -0.2(y+3) = -0.2y -0.6$