Question

efectuati folosind factorul comun : a) 82 +96 ori 82 +97 ori 18=

b) 27 ori 101 -27=
c) 14 ori (x +y) - 5 ori ( x + y)=
d) (a+b) ori ( b+c ) ori (c+a) - (a+b) ori (b-c) ori ( a+c) =

Answer 1

a) 82 +96 x 82 +97 x 18=82x(1+96)+97x18=82x97+97x18=97x(82+18)=97x100=9700 b) 27 x101 -27=27x(101-1)=27x100=2700

c) 14· (x +y) - 5 · ( x + y)=(x+y)·(14-5)=9·(x+y)

d) (a+b) x ( b+c ) x (c+a) - (a+b) x (b-c) x ( a+c) =(a+b) x  ( a+c)x(b+c-b+c)=(a+b) x  ( a+c)x2c