Question

ex 1 Calculeaza
a)12x7+12x3
b)6x10+12x10+17x10
c)14x22-14x10-14
d)5x32+5x70-5x5
e)43x275+57x275
f)175x123+27x123-102x123
ex 2 Scoate factor comun
a)2x1+2xb+2xc
b)5 x x+5xy - 5 x z
c)7xa+7xv+49
d)3ori x-3xy+3
3 Daca x = 3 si y+z-10 calculeaza:
a)7ori x+7xy+7xz
b)17ori x +17xy+17xz-10
c)5ori x+10xy+10xz
d)100ori x -(9oriy+9xz)

Answer 1

1)
a)12x7+12x3=84+36=120

b)16x10+12x10+17x10=160+120+170=450

c)308+140-14=448-14=434

d)160+350-25=510-25=485