I don´t get it plz help asap i only have a few min. Complete this square to find the vertex of this parabola

x²-4y 12x+ 68=0

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(an explanation would mean the world in help!!!)

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Can someone plz me understand how to do these. plz, show work.in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]