Question

Zapisz w jak najprostszej postaci

a) -4(2x+0,5)

b)3(x^2-2)-(5-6x^2)

c)-3(1-y2)+1/2(6-12y)

d) -(x-2)-4(1/2-x)

Answer 1

a)
-4(2x + 0,5) = -8x - 2

b)
3(x^2-2) - (5 - 6x^2) = 3x^2 - 6 - 5 + 6x^2 = 9x^2 - 11

c)
-3 (1 - 2y) + 1/2 (6 - 12y) = -3 + 6y + 3 - 6y = 0

d)
-(x - 2) - 4(1/2 - x) = -x + 2 - 2 + 4x = 3x

Answer 2

a)  -4(2x+0,5)=-8x-2

b)3(x^2-2)-(5-6x^2)= 3x^2-6-5+6x^2=-11+9x^2

c)-3(1-y2)+1/2(6-12y)=-3+3y^2+3-6y=3y^2-6y

d) -(x-2)-4(1/2-x) =-x+2-2+4x=3x