Question

Simplifique:
25x²-20x+4

Answer 1

a) 25
b)-20
c)4

Δ= b²-4ac
Δ=(-20)²-4.25.4
Δ=400-400
Δ=0

x=$\frac{-b}{2a}$
x= $\frac{-(-20)}{2.25}$
x=$\frac{20}{50}$
x=-0,4