Question

ajuuuuuuuuuuuuuuutooor
Descompuneti in factori trinomul:
-2X²+3X+5.

Answer 1

-2X²+3X+5
asociem trinomul de gradul 2 cu ecuatia de gradul 2
-2x²+3x+5=0
a= -2       b= 3       c=5
Δ=b² - 4×a×c
Δ= 9 - 4×( -2 )×5 = 49>0
x1=( -3 - √49) ÷ ( -4)          x2= (-3+√49)÷( -4)
x1=2,5       x2= -1
descompunem in factori trinomul de gradul 2 dupa formula:
a(X - x1)(X - x2)
-2(X - 2,5)(X+1)