Zadania w załączniku
w załączniku
18.
a)
x^2 *(2x^3 - x + 2) = 2x^5 - x^3 + 2x^2
b)
-3x(x^3 + 1/3 x^2 - 2) = -3x^4 - x^3 + 6x
c)
1/2 x^3 *(x^3 - 4x^2 - 1/2 x + 6) = 1/2 x^6 - 2x^5 - 1/4 x^4 + 3x^3 =
= 1/2 x^6 - 2x^5 - 1/4 x^4 + 3x^2
19.
(x+3)(x^2 + 2x - 7) = x^3 + 2x^2 - 7x + 3x^2 + 6x - 21 = x^3 + 5x^2 - x - 21
(3x-2)(2x3 - 3x^2 - 5) = 6x^4 - 9x^3 - 15x - 4x^3 + 6x^2 +10 = 6x^4 - 13x^3 + 6x^2 - 15x +10
(2x^2 - 5x)(-3x^2 = x -7) = -6x^4 + 2x^3 - 14x^2 + 15x^3 - 5x^2 + 25x =
= -6x^4 + 17x^3 - 19x^2 + 35x
d)
(x^2 - 2x +3)(x^3 - 7x) = x^5 - 7x^3 - 2x^4 + 14x^2 + 3x^3 - 21x =
= x^5 - 2x^4 - 7x^3 + 17x^2 - 21x
(^ - do potęgi)
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w załączniku
18.
a)
x^2 *(2x^3 - x + 2) = 2x^5 - x^3 + 2x^2
b)
-3x(x^3 + 1/3 x^2 - 2) = -3x^4 - x^3 + 6x
c)
1/2 x^3 *(x^3 - 4x^2 - 1/2 x + 6) = 1/2 x^6 - 2x^5 - 1/4 x^4 + 3x^3 =
= 1/2 x^6 - 2x^5 - 1/4 x^4 + 3x^2
19.
a)
(x+3)(x^2 + 2x - 7) = x^3 + 2x^2 - 7x + 3x^2 + 6x - 21 = x^3 + 5x^2 - x - 21
b)
(3x-2)(2x3 - 3x^2 - 5) = 6x^4 - 9x^3 - 15x - 4x^3 + 6x^2 +10 = 6x^4 - 13x^3 + 6x^2 - 15x +10
c)
(2x^2 - 5x)(-3x^2 = x -7) = -6x^4 + 2x^3 - 14x^2 + 15x^3 - 5x^2 + 25x =
= -6x^4 + 17x^3 - 19x^2 + 35x
d)
(x^2 - 2x +3)(x^3 - 7x) = x^5 - 7x^3 - 2x^4 + 14x^2 + 3x^3 - 21x =
= x^5 - 2x^4 - 7x^3 + 17x^2 - 21x
(^ - do potęgi)