# Lesson 21: Solving Quadratic Equations by Completing the Square and Using the Quadratic Formula

Aralin tungkol sa pagkuha ng values ng mga variables gamit ang ZPP. Ginagamit ang ZPP kapag ang expressions mo ay gawa sa factors. Minsan, kailangan mong mag-factoring bago gamitan ng ZPP. Ine-equate nito ang factors sa 0 para makuha ang sagot. Maaring mga quadratic, cubic, o ano mang klase ng polynomial ang mga expressions mo.

0:51 3x(x+1)=0

1:33 x(2x-1)=0

2:07 (x+5)(3x+7)=0

2:58 5x^2 + 10x = 0

3:44 x^2 +7x + 12 = 0

4:53 h^2 + 10h = -21

5:47 5m^2 -45 = 0

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