PrinceMitchem PrinceMitchem

17-06-2015
Mathematics

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If 4x^2 - 100 = 0, the roots of the equation are
(1) -25 and 25 (3) -5 and 5
(2) -25, only (4) -5, only

Respuesta :

17-06-2015

[tex]4x^2-100=0 \ \ \ \ \ \ |+100 \\ 4x^2=100 \ \ \ \ \ \ \ \ \ \ \ |\div 4 \\ x^2=25 \\ x=\pm \sqrt{25} \\ x=\pm 5 \\ x=-5 \hbox{ or } x=5[/tex]

The answer is (3) -5 and 5.

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