PrinceMitchem PrinceMitchem

17-06-2015
Mathematics

Answered

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

Verified Answer :

17-06-2015

\(4x^2-100=0 \ \ \ \ \ \ |+100 \\ 4x^2=100 \ \ \ \ \ \ \ \ \ \ \ |\div 4 \\ x^2=25 \\ x=\pm \sqrt{25} \\ x=\pm 5 \\ x=-5 \hbox{ or } x=5\)

The answer is (3) -5 and 5.

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