please help me solve this problem x^2 -3x +________identify the value that would make the following a perfect square

Question

anonymous · Answer

2.25
That would make it (x-1.5)^2.

anonymous · Answer

Thank you for your help

anonymous · Answer

The idea is, you want to have $(x-a)^2$. Expanded, you have $x^2-2ax+a^2$.
Matching up with the given polynomial:
$$x^2-3x+\cdots=x^2-2ax+a^2$$
So you have
$$\begin{cases}-3=-2a\
\cdots=a^2\end{cases}$$
You'd solve the first equation for $a$, then plug it into the second equation.

anonymous · Answer

okay so I need to work this problem out

anonymous · Answer

If you're told to show work, then this is the way to do it.

anonymous · Answer

okay thank you

anonymous · Answer

You're welcome

anonymous · Answer

one more questions my class mate came up with 9/4 is that correct

anonymous · Answer

how do I work the second part of this problem

anonymous · Answer

9/4 = 2.25