^2 - do kwadratu
^3 - do sześcianu
^4 - do potęgi czwartej
Zadanie 2
c) (1,3x)×(5y)×2 = (6,5xy)×2 = 13xy
e) (3xy)×(-2x)×(-3y) = (-6x^2y)×(-3y) = 18x^2y^2
f) (1 1/2a)×(2 1/2b)×(-4) = (3 3/4ab)×(-4) = -15ab
g) (-5)×(-3x)×(-x^2y)×(-xy) = (15x)×(-x^2y)×(-xy) = (-15x^3y)×(-xy) = 15x^4y^2
Zadanie 3
c) -6×(xy+3y-4x) = -6xy - 18y + 24x
d) -3×(2x^2-4+3,5y) = -6x^2 + 12 - 10,5y
e) 1,2×(a^2+5b-2c) = 1,2a^2 + 6b - 2,4c
Zadanie 4
b) 3x×(x-9y-11) = 3x^2 - 27xy - 33x
c) 10ab×(3,4a^2b-2,5ab-9,3b^2-8a^2) = 34a^3b^2 - 25a^2b^2 - 93ab^3 - 80a^3b
Zadanie 5
a) 2a×(x+5y)+3x×(a-5y) = 2ax+10ay+3ax-15xy = 5ax + 10ay - 15xy
c) 5x×(-0,4y-4)-2y×(x^2-6) = -2xy - 20x - 2x^2y + 12y
d) 7b×(5+3ax)-2bx×(2a-5b) = 35b+21abx-4abx+10b^2x = 35b + 17abx + 10b^2x
