I know the answer, just teach me how to work it out.

x2 = 14x – 49

Question

I know the answer, just teach me how to work it out.

x2 = 14x – 49

karatechopper · Answer

ok well first since this is a quadratic equation, you wanna make the equation equal 0

karatechopper · Answer

So you would do this step first...
x2-x2=-x2+14x-49

anonymous · Answer

Key pattern for this one:  a^2-2ab+b^2=(a-b)^2  Once we recall this, it's easy.  $$x^2 = 14x – 49 \implies x^2 -14x + 49=0=(x-7)^2 \implies x=7$$

karatechopper · Answer

making that become,
0=-x2+14x-49
only there is one problem..a number with an exponent can never be negative!
 So we change the signs of everything! like this!
0=x2-14x+49
NOTE- i did not put a negative in front of zero because it would make no different..

karatechopper · Answer

Now, do you know how to factor things? @destinyshaw

anonymous · Answer

Yes I do

karatechopper · Answer

ok then go ahead and factor it out for me!

anonymous · Answer

@AnimalAin just did it for me... but I just looked at my work, and tell me what factorin gis exactly just in case it is a test question in the future