Question

Folosind formula (a+b)la puterea 2 = a la p. 2 +2ab + b la p. 2, calculati : a) (x+1) totu la 2

Answer 1

este lafel numai ca in loc de a pui x si in loc de b pui 1
deci daca
(a+b)la puterea 2 = a la p. 2 +2ab + b la p. 2
atunci
(x+1)la puterea 2 = x la p. 2 +2x + 1 la p. 2

Answer 2

$(x+1)^2 =x^2+2\cdot x\cdot1 +1^2 = x^2+2x+1$