Me

what is the factored form of 7x^2-21x=0

First, divide by 7 so you have nothing in front.



Then we proceed with completing the square:

Normally we would move the constant to the right but in this case, there is none.

Take half of the x coefficient and square it. Add it to both sides.
So that's -3.
Half is .
Square it:

Add it to both sides:



Write the perfect square on the left:


Square root both sides:


Solve for x:


Which simplifies to:


Hope that helps.

Omg that is a big question and weird words and i’m only 5