Respostas
Resposta:Segue as contas abaixo
Explicação passo-a-passo:
a)x²-25=0 b)2x²-32=0 c)7x²-343=0 d)x²-81=0 e)x²=1
x²=25 2x²=32 7x²=343 x²=81 x= ±√1
x= ±√25 x²=32/2 x²=343/7 x= ±√81 x= ± 1
x= ± 5 x²=16 x²=49 x= ± 9
x= ±√16 x= ±√49
x= ± 4 x= ± 7
f)2x²-50=0 g)7x²-7=0 h)5x²-15=0 i)21=7x² j)5x² +20=0
2x²=50 7x²=7 5x²=15 x²=21/7 5x² =-20
x²=50/2 x²=7/7 x²=15/5 x²=3 x² =-20/5
x²=25 x²=1 x²=3 x= ±√3 x²=-4
x= ±√25 x= ±√1 x= ±√3 x= ±√-4
x= ± 5 x= ± 1 x= ±√4i
x= 2i(numero
complexo)