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Descompuneți în facrori :
a).x²+11x+30
b).x²+15x+56
c).x²+12x+35
d).x²+7x+6
e).x²+9x+8
f).x²+13x+42
g).x²+11x+18


Răspuns :

a).x²+11x+30= (x+ 5)(x+ 6)

b).x²+15x+56= (x+ 7)(x+ 8)

c).x²+12x+35= (x- 5)(x+ 7)

d).x²+7x+6=(x+ 1)(x+ 6)

e).x²+9x+8=( x= 1)(x+ 8)

f).x²+13x+42=(x+ 6)(x+ 7)

g).x²+11x+18= (x+ 2)(x+ 9)