IDNStudy.com, ang iyong destinasyon para sa mga maaasahang sagot. Tuklasin ang libu-libong mga sagot na na-verify ng mga eksperto at hanapin ang mga solusyong kailangan mo, anuman ang paksa.

how do you solve x^{2} -25

Sagot :

You want to expand it, right?
Here's how:
[tex] x^{2} -25 \\ (x+5)(x-5)[/tex]

If you're gonna ask why, it's because they're both squares and you need to follow the rule "Difference of two squares". Also, the square root x² is x and the square root of 25 is 5.
[tex]x^{2} -25 =x^2-5^2=(x-5)(x+5)\\\\ we \ use \ the \ difference \ of \ squares \\\\a^2-b^2=(a-b)(a+b)[/tex]