Question

Przedstaw w postaci iloczynu .

a) (x+y)*a+(x+y)*b =

b) 3(z-y)-a(z-y) =

c) (m-1)(k-1)+(k-1)(m+1) =

d) (a-1)(b+c)-(a-1)(b-c) =

na dzisiaj ;] jbc Matematyka z plusem zad.12 str.162

Answer 1

a)(x + y) * a + (x + y) * b = 
= (x + y)(a + b)

b)
3(z - y) - a(z - y) =
= (3 - a)(z - y)

c)
(m - 1)(k - 1) + (k - 1)(m + 1) =
= (k - 1)(m - 1 + m + 1) =
= (k - 1)*2m

d)
(a - 1)(b + c)-(a - 1)(b - c ) =
= (a - 1) [b + c - (b - c)] = 
= (a - 1) (b + c - b + c) =
= (a - 1)*2c