Tuklasin kung paano ka matutulungan ng IDNStudy.com na makuha ang mga sagot na kailangan mo. Tuklasin ang mga maaasahang impormasyon sa anumang paksa sa pamamagitan ng aming network ng bihasang mga propesyonal.

How to solve quadtatic equation using this. 4n2-81=0?

Sagot :

So the quadratic equation is 
[tex]4n^2-81=0 \\ 4n^2=81 \\ n^2= \frac{81}{4} [/tex]

We can have two values for n which is either the positive or negative squareroot of 81/4
[tex]n= \frac{9}{2} \\ n=- \frac{9}{2} [/tex]

We can also factor is out:
[tex]4n^2-81=(2n+9)(2n-9)[/tex] and we get the same answer