Porfavor me ajudem resolver as equações do 2º grau incompleta ?

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4x² - 64 = 0

4x² - 324 = 0

6x² - 24 = 0

2x² - 32 = 0

x²- 32 = 0

x² - 16/9 = 0

5x² - 45 = 0

10x² = 810
Best Answer
a) 4x² - 64 = 0
4x² = 64
x² = 64/4
x² = 16
x = 4

b) 4x² - 324 = 0
4x² = 324
x² = 324/4
x² = 81
x = 9

c) 6x² - 24 = 0
6x² = 24
x² = 24/6
x² = 4
x = 2

d) 2x² - 32 = 0
2x² = 32
x² = 32/2
x² = 16
x = 4

e) x² - 32 = 0
x² = 32
x = 5,65685425 (?)

f) x² - 16/9 = 0
x² = 16/9
x = 4/3

g) 5x² - 45 = 0
5x² = 45
x² = 45/5
x² = 9
x = 3

h) 10x² = 810
x² = 810/10
x² = 81
x = 9
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  • camila_arnache answered 5 years ago
    4x²=64 x²=64/4 = x²=16 = x=4
    4x²=324 x²=324/4 = x²=81 = x=9
    6x²=24 x²=24/6 = x²=4 = x=2
    2x²=32 x²=32/2 = x²=16 x=4
    x²=32 x= 5,66
    x2 =16/9 x=4/3
    5x²=45 x²=9 = x=3
    10x²=810 x²=81 x²=9
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  • maripim answered 5 years ago
    4x² - 64 = 0 --------- x² = 64/4 --> x² = 16 --> x = 4

    4x² - 324 = 0 ------- x² = 324/4 --> x² = 81 -- > x = 9

    6x² - 24 = 0 ------- x² = 24/6 ---> x² = 4 --> x = 2

    2x² - 32 = 0 ------- x² = 32/2 --> x² = 16 --> x = 4


    x² - 16/9 = 0 ------- x² = 16/9 --> x = 4/3

    5x² - 45 = 0 ------ x² = 45/5 ---> x² = 9 --> x = 3

    10x² = 810 ------- x² = 810/10 --> x² = 81 --> x=9
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  • ♥ ŠÜZÎ ♥ answered 5 years ago
    a)4( x² - 16 ) = 4( x+4)(x-4) 0u
    x³ - 16 = 0
    x² = 16
    x = +-4
    b) 4( x² - 81) = 4(x+9)(x-9) ou
    x² - 81 = 0
    x² = 81
    x = +-9
    c) 6( x²-4) = 6(x+2)(x-2) ou
    x² - 4 = 0
    x² = 4
    x = +-2
    d) 2( x² - 16) = 2( x+4)(x-4) ou
    x² - 16 = 0
    x² = 16
    x = +-4
    e) x² = 32 ou x² - 32 = 0 ou Vx² = V32 ou x = V2²*2²* 2
    ou x = 4V2
    f) ( x + 4/3)(x-4/3) ou
    x² - 16/9 = 0
    x² = 16/9
    x = +- 4/3
    g) 5( x² - 9 ) = 5( x+3)(x-3) ou
    x² - 9 = 0
    x² = 9
    x = +- 3
    h) 10( x² - 81) = 10( x+9)(x-9 ) ou
    x² - 81 = 0
    x² = 81
    x = +- 9
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