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a fost răspuns


2 Calculatu aplicand fornitole de calcul prescarlata
a) 2x+1)?
b)(3x-2²
c)(3x-2)(3x+2)
d) (dy + bally-
el (53 1² J2x)?
&l (1-5x² + 4+ 5+/- 2.5x2_2=
g) (2x - 3) (2x + 3) (4 x 249) =​

Răspuns :

(2x+1)²= (2x)²+2×2x×1+1²= 4x²+4x+1

(3x-2)²= (3x)²-2×3x×2+2²= 9x²-12x+4

(3x-2)(3x+2)= (3x)²-2²=9x²-4

La restul exercitiilor nu se intelege nimic.

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