Question

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Vă rooog. :)
a) xpatrat +4x+4
b) 4xpatrat +4x+1 
c)xpatrat+5x+6
d)xpatrat-15x+56
e) x patrat- 6x-8

Answer 1

a)$x^{2}$+4x+4=0 -ecuatie de gradul 2
Δ=$b^{2}$-4ac=$4^{2}$-4+4=0 =>x1=x2
x1,2=(-b+-radical din Δ)/2a=(-4+-0)/2=-2

Answer 2

a)x patrat +4x+4=(x+2) totul la patrat
b)4x(x+1)+1
c)x patrat+2x+3x+6=
x(x+2) + 3(x+2)
=(x+2)(x+3)
d)x patrat-7x-8x+56
=x(x-7)-8(x-7)
(x-8)(x-7)