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Ajutor dau corana
Descompuneti in factori :
a) x^2 +12x +35
b)x^2 +17x+70
c)x^2 +15x +56
d)x^2 -9x +20
e)x^2 -14x +42
f)x^2 - 13x+42
va rog dau coroana


Ajutor Dau Corana Descompuneti In Factori A X2 12x 35bx2 17x70cx2 15x 56dx2 9x 20ex2 14x 42fx2 13x42 Va Rog Dau Coroana class=

Răspuns :

a) x^2+7x+5x+35= x (x+7)+ 5 (x+7)= (x+7)(x+5)
b)x^2+10x+7x+70= x (x+10)+7 (x+10)= (x+7)(x+10)
c)x^2+7x+8x+56=x (x+7)+8 (x+7)=(x+7)(x+8)
d)x^2-4x-5x+20=x (x-4)-5 (x-4)= (x-4)(x-5)
f)x^2-7x-6x+42=x (x-7)-6 (x-7)= (x-7)(x-6)