Odpowiedź:
a) -2*( x - [tex]\frac{5}{2}[/tex])( x + 3) = 0
x - 2,5 = 0 lub x + 3 = 0
x = 2,5 lub x = -3
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b) 2( x + 4)( x - [tex]\frac{1}{2}[/tex] ) = 0
x + 4 = 0 lub x - 0,5 = 0
x = - 4 lub x = 0,5
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c) 3( x - [tex]\frac{1}{3}[/tex] )( x + [tex]\sqrt{21}[/tex] ) = 0
x - [tex]\frac{1}{3}[/tex] = 0 lub x + [tex]\sqrt{21}[/tex] = 0
x = [tex]\frac{1}{3}[/tex] lub x = - [tex]\sqrt{21}[/tex]
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d) - 4 x ( x + 3[tex]\sqrt{2}[/tex] ) = 0
x = 0 lub x + 3[tex]\sqrt{2}[/tex] = 0
x =0 lub x = - 3[tex]\sqrt{2}[/tex]
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e) x² + 2 x = 0
x*( x + 2 ) = 0
x = 0 lub x + 2 = 0
x = 0 lub x = - 2
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f ) 2 x² + 2 x = 0
2 x*( x + 1 ) = 0
x = 0 lub x + 1 = 0
x = 0 lub x = - 1
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Szczegółowe wyjaśnienie:
