Question

Bez użycia wzoru na delte ?

1.=121

2.

3.-x^

4.9-25=0

5.

6.

Answer 1

1.

x^2 = 121

x = 11

2.

x^2 = 4/25

x = 2/5

3.

x^2 = -169

sprzeczne

4. 

x^2 = 25

x =5

5.

x(x+4) = 0

x = 0 lub x+4 = 0

             x = -4

6.

x(x+8) = 0

x = 8 lub x+8 =0

              x = -8

 

Answer 2

1.   x^2 = 121

x = - 11  lub  x = 11

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2.   x^2 = 4/25

x = - 2/5   lub  x = 2/5

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3.   x^2 + 169 = 0

Nie ma rozwiązania

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4.   9 x^2 - 25 = 0

9 x^2 = 25  / : 9

x^2 = 25/9

x = - 5/3  lub  x = 5/3

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5.   x^2 + 4x = 0

      x *( x + 4) = 0

x = 0   lub  x + 4 = 0

x = 0  lub  x = - 4

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6.    x^2 + 8 x = 0

x*( x + 8( = 0

x = 0  lub  x + 8 = 0

x = 0  lub  x = - 8

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