Need help with Quadratic Equations

HTM

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Oct 20, 2021
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I need help in understanding what quadratic equations really are.
 
Nevermind, found this link that explained it clearly for me, might be of help to you too.

Link removed because the uploader has removed the video from YouTube.
 
A quadratic equation is an equation involving only non-negative powers of the unknown of degee 2 and less. Any quadratic equation can be written in the form ax2+bx+c=0\displaystyle ax^2+ bx+ c= 0 where b and c can be 0 but not a.

Notice the word "can", The equation 3x25x=x2+2x3\displaystyle 3x^2- 5x= x^2+ 2x- 3 is not exactly of that form but by subtracting x2+2x3\displaystyle x^2+ 2x- 3 from both sides we get 2x27x+3=0\displaystyle 2x^2- 7x+ 3= 0 which is so 3x25x=x2+2x3\displaystyle 3x^2- 5x= x^2+ 2x- 3 IS a quadratic equation.
 
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