rewrite x^2-12x+ 15 in the form (x -a)^2 +b, and hence solve the equation x^2-12x+15=0, giving your answer in exact form.​

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a diamond or heart. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability of randomly selecting a diamond or heart or club. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability of randomly selecting queen or club. (type an integer or a decimal rounded to three decimal places as needed.)

Marking brainliest for original answer.. are these two triangles similar? how can you tell?

Which are the possible side lengths of a triangle?