Question

Людиии пж помогите. прошуу номер 343(1.3.5)

Answer 1

$1) frac{(x+1)(x-1)+120}{6(x-1)} = frac{4*6(x-1)}{6(x-1)} \ x^{2} -1+120=24x-24 \ x^{2} -24x+143=0 \ D=576-4*143=4 textgreater 0 \ x1= frac{24+2}{2} =13 \ x2= frac{24-2}{2} =11$
$3) frac{3(x+1)+(1-x)}{(1-x)(x+1)} = frac{28}{(1-x)(1+x)} \ 3x+3+1-x=28 \ 2x=24 \ x=12$
$5) frac{16(1-x)+30(x-3)}{(x-3)(1-x)}= frac{3*(x-3)(1-x)}{(x-3)(1-x)} \ 16-16x+30x-90=3x-3x^2-9+9x \ 3x^2+2x-65=0 \ D=4-4*3*(-65)=784 textgreater 0 \ x1= frac{-2+28}{6}= frac{26}{6}= 4frac{1}{3} \ x2= frac{-2-28}{6} =-5$