СРОЧНО НУЖНА ПОМОЩЬ

СРОЧНО НУЖНА ПОМОЩЬ

  • А) 28 – 11 + x= 0D= (-11)^2 – 4 1 28 = 121 – 112 = 9 = 3^2×1 = 11 + 3/2 1 = 14/2 = 7×2 = 11 – 3/ 2 1 = 8/2 = 428 – 11 + x = ( x – 7 ) ( x – 4)42 – 20 x + 2x^2 = 0D = ( -20 )^2 – 4 2 42 = 400 – 336 = 64 = 8^2×1 = 20 + 8/ 22 = 28/4 = 7×2 = 20 – 8/ 22 = 12/2 = 642 – 20x + 2x^2 = ( x – 7) ( x – 3)( x – 7 ) ( x – 4 ) / ( x – 7 ) ( x – 3 ) = x -4 / x -3б) 6x^2 – 49x + 8 = 0D = ( – 49 )^2 – 4 6 8 = 2401 – 192 = 2209 = 49^2×1 = 49 + 47/ 26 = 96/12 = 8×2 = 49 – 47/ 26 = 2/12 = 1/66x^2 – 49x + 8 = ( x – 8 ) ( x – 6 )6x^2 – 36 x – 96 = 0D = ( – 36)^2 – 4 6 ( – 96 ) = 1296 + 2304 = 3600 = 60^2×1 = 36+60/26 = 96/12 = 8×2 = 36 – 60/26 = – 24/12 = – 26x^2 – 36x – 96 = ( x – 8 ) ( x +2 )( x – 8 ) ( x – 6 )/ ( x -8 ) ( x + 2 ) = x – 6/ x + 2/ – это деление )Если что то непонятно , спрашивай )
  • Тут не видно, можно качество лучше