IDNStudy.com, ang iyong destinasyon para sa maaasahan at pangkomunidad na mga sagot. Alamin ang mga detalyadong sagot sa iyong mga tanong mula sa aming malawak na kaalaman sa mga eksperto.

What is quadratic equation and give examples in solving quadratic equation by extracting square roots




Sagot :

Solve (x + 1)(x – 3) = 0.This is a quadratic, and I'm supposed to solve it. I could multiply the left-hand side, simplify to find the coefficients, plug them into the Quadratic Formula, and chug away to the answer.But why would I? I mean, for heaven's sake, this is factorable, and they've already factored it and set it equal to zero for me. While the Quadratic Formula would give me the correct answer, why bother with it? Instead, I'll just solve the factors:(x + 1)(x – 3) = 0 
x + 1 = 0  or  x – 3 = 0 
x = –1  or  x = 3
The solution is  x = –1, 3