Help Please! 2 questions involving quadratics equations, i know how to solve them, but I cannot figure out how to solve these 2 problems. (I have to complete it myself, which I havve NEVER done before. Any guidance would be greatttt!!!) Will post my q's in the comments below, thanks!!!

Question

bookworm14 · Answer

attachment

jhannybean · Answer

For the first one: $x^2-11x+~?$

In completing the square, think of  your function as a quadratic: $ax^2+bx+c=0$.

jhannybean · Answer

Therefore, you need to find your `c` value, and in order to do that,you need the `b` value from the quadratic, use the formula:$$c=\left(\frac{b}{2}\right)^2$$

bookworm14 · Answer

30.25?

anonymous · Answer

d for both

jhannybean · Answer

Don't give out answers.

anonymous · Answer

u can simply open the square and then u get ur answer

jhannybean · Answer

I'm explaining how to complete the square.

bookworm14 · Answer

@HARSH123  thank you for the answer, but it is important for me to learn how to work these out. 

@Jhannybean  i'm hoping i'm on the right track here lol

jhannybean · Answer

$$x^2-11x+\left(\frac{-11}{4}\right)^2 =\left(\frac{-11}{2}\right)^2$$Now a quick way to simplify the perfect square is to take into account your c value. basically your function always reduces to your b-value/2. This is a rule.$$c=\left(\color{red}{\frac{-11}{2}}\right)^2$$$$x^2-11x+~?=0 \implies \left(x-\color{red}{\left(\frac{b}{2}\right)}\right)^2=c$$

bookworm14 · Answer

Ohhhhh, @Jhannybean thank you!! I get it (I really do!) thank you! I see how to get the answer now :) thank you for actually showing me how to do it, instead of just blurting out answers at me lol xD

jhannybean · Answer

Yoru function always will simplify to (x-(b/2))$^2$*

jhannybean · Answer

No problem, Try the next one the same way and you can check back with me.