Question

Przedstaw w postaci iloczynu:

- (x+y)*a+(x+y)*b
- 3(z-y)-a(z-y)

- (m-1)(k-1) + (k-1)(m+1)

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


PROSZĘ SZYBKO O ROZWIĄZANIE :D!!!

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