Упростить алгебраическую сумму многочленов (244-246)

Объяснение:

244

1) = 8a - 3b + 5a = 13a - 3b

2) = 5x - 2x + 3y = 3x + 3y

3) = 6a - 2b - 5a - 3b = a - 5b

4) = 4x + 2 - x - 1 = 3x + 1

245

1) = 2 3/5 b - 3/4 b^2 + 1/4 b^2 - 1 3/5 b = b - 1/2 b^2

2) = 0.1c - 0.4c^2 - 0.1c + 0.5c^2 = 0.1c^2

3) = 13x - 11y + 10z + 15x - 10y + 15z = 28x - 21y + 25z

4) = 17a + 12b - 14c - 11a + 10b + 14c = 6a + 22b

1)0,04^(-2) - 0,008^(-1) + 0,08^(-2)-0,2^(-4)=

  = 1/0,04^(2) - 1/0.008 + 1/0.08^(2) - 1/0.2^(4)=

  = 1/0.016 - 125 + 1/0.0064 - 1/0.0016 = -125 + 156.25=31.25

2)3,6*10^6

      * 5*10^4 = 3.6 * 10^6 / (9*10^8) * 5*10^4 =

    (3*10^4)^2

= 18*10^10 / (9*10^8) = 2*10^2=200