Question

resolva a equaçao 4x-20x+25=0

Answer 1

4x - 20x + 25 = 0
-16x = -25 (-1)
16x = 25
x = 25 : 16
x = 1,5625

Answer 2

a=4
b=-20
c=25

Δ=b²-4ac
Δ=(-20)²-4.4.25
Δ=400-400
Δ=0

-b+-√Δ =   -(-20)+-√0=
   2a              8

x'=20+0/8=20/8=5/2

x''=20-0/8=20/8=5/2

:)