A. 2x4 + 21x2 +3x -2
B. 2x4 + 9x2 -2
C. 3x2 + 6x+ 1
D. 2x4 + 9x3 +12x2 + 3x -2

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

The triangles are similar. what is the value of x? show your work.

What other information do you need to prove triangle dac=bca by asa