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**WannaBSmart** Hi. I need help for an upcoming test tomorrow. I did some practice problems, can you guys please check if they're right? And if not, can you please do it and show me your work? I feel like I get the basic concept but I'm missing a few steps.

Complete the square for each expression. Write the resulting expression as a binomial squared.

23. $\displaystyle x^2 - 18x + _ $

My answer $\displaystyle (x-9)^2$

24. x^2 + 10x + _

My answer $\displaystyle (x+5)^2$

25. $\displaystyle x^2 - 1/2x + _$

My answer $\displaystyle (x+1/4)^2$

Solve each equation by completing the square (I feel I got these questions wrong)

26.$\displaystyle x^2 + 2x = 7$

My answer $\displaystyle x=5 x=-7$

27. $\displaystyle x^2 - 4x = -1$

My answer $\displaystyle x=4 x=0 $

I will also post questions about writing each function in vertex form, but right now I'm focused on this. Can you guys please see if I got anything wrong and if I did, can you please show me how you got the right answer? Also, it would be nice if you guys could explain it or even show a video. This is a great community and I would like to thank everybody who contributes on this website!