Question

Me Ajudem Aq Pfvr É Pra Hoje essa prova
Encontre as raízes das equaões do 2 grau imcompletas


a)2x²-5=0
b)x²-2=0
c)3x²-75=0
d)4x²+100=0
e)9x²-1=0
f)x²+1=0
g)t²-121=0
ME AJUDEM PFVR

Answer 1

a) 2x²-5=0
x² = 5/2
x' = √5/2
x" = -√5/2

b)x²-2=0
x² = 2
x' = √2
x" = -√2

c)3x²-75=0
x² = 75 /3
x = √25
x' = 5
x" = -5

d)4x²+100=0
4x² = -100
x² = -100/4
x² = -25
x' = √-25
x" = -√25

e)9x²-1=0
x² = 1/9
x' = √1/9 = 1/3

x" = -√1/9 = -1/3

f)x²+1=0
x² = -1
x' = √-1
x" = -√-1

g)t²-121=0
t² = 121
t = √121
t' = 11
t" = -11

Answer 2

a)2x²-5=0 ==> 2x^2 = 5 ==> x^2 = 5/2 ==> x^2= +/-√5/2
                                                                             
b)x²-2=0 ==> x^2 = 2 ==> x = +/-√2

c)3x²-75=0 ==> 3x^2 = 75 ==> x^2 = 75/3 ==> x^2 = 25

 x = +/-√25 ==> x = +/- 5

d)4x²+100=0 ==> 4x^2 = - 100 ==> x^2 = - 25      ∅

e)9x²-1=0 ==> 9x^2 = 1 ==> x^2 = 1/9 ==> x = +/- 1/3

f)x²+1=0 ==> x^2 = - 1 ==>      ∅

g)t²-121=0 ==> 9x^2 = 121 ==> x^2 = +/- 11