Question

Determine as raizes das equação
A)ײ=81
B)ײ=100
C)(×-7)²=0
D)(×+5)²=0
Pfvoooo me ajudem Ai

Answer 1

a)
x = ±√81
x = ± 9

{-9 , 9}

b)
x = ±√100
x = ± 10

{-10 , 10}

c)
(x -7)² = 0
x² -14x +49 = 0

Δ
196 -4*49
0

x = 14/2
x = 7

{7}

d)
(x +5)² = 0
x² +10x +25 = 0

Δ
100 -100
0

x = -10/2
x = -5

{-5}