Question

( x y -5)² calcule o quadrado

Answer 1

Hello,
(xy-5)²
xy²-2.xy.5-25
xy²-10xy-25
a=1
b=10
c=25

fórmula de baskhara:
-b+/-√b²-4ac/2a
10+/-√10²-4.1.25/2.1
10+/-√100-100/2
10+/-√0/2
10+0/2
10/2
x'=5
10-0/2
10/2
x"=5

espero ter ajudado e Bons Estudos!