Question

х²(х²-3х+1)-2х(х³-3х²+х) если х = 1целая 1/3 срочно!!!!!! Плиииз

Answer 1

1) упростим выражение:

${x}^{2} ( {x}^{2} - 3x + 1) - 2x( {x}^{3} - 3 {x}^{2} + x) = {x}^{4} - 3 {x}^{3} + {x}^{2} - 2 {x}^{4} + 6 {x}^{3} - 2 {x}^{2} = - {x}^{4} + 3 {x}^{3} - {x}^{2} = - {x}^{2} ( {x}^{2} - 3x + 1)$
2) подставим наше значение х:
$- ({1 frac{1}{3} )}^{2} times ( {(1 frac{1}{3} )}^{2} - 3 times 1 frac{1}{3} + 1) = - {( frac{4}{3} )}^{2} times ( {( frac{4}{3} )}^{2} - 3 times frac{4}{3} + 1) = - frac{16}{9} times ( frac{16}{9} - 4 + 1) = - frac{16}{9} times (1 frac{7}{9} - 3) = frac{16}{9} times ( - 1 frac{2}{9} ) = - frac{16 times 11}{9 times 9} = - frac{176}{81} = - 2 frac{14}{81}$