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Va rog rezolvati !!!!

Va Rog Rezolvati class=

Răspuns :

Răspuns:

(x+1) ^2 = x^2 +2x1x X+1^2 =x^2 +2x+1

(x+5)^2 = x^2 +2x X5+5^2=x^2 +10x+25

(2x+3)^2 =4x^2 +2x X3+3^2=4x^2 +6x+9

(x+7)(x-7)=x^2 - 7x+7x-49=x^-49

(3-x)(3+x)=9+3x-3x-x^2 =9-x^2