!!20 points and Brainliest!!!! Make sure to explain!!!
Which of the following would best be solved using completing the square?
A) 2x^3 - 12x^2 + 5x - 30 = 0
B)5x^2 + 7x = 12
C) x^2 = 81
D) x^2 + 4x - 21 = 0
![20 points and Brainliest Make sure to explain Which of the following would best be solved using completing the square A 2x3 12x2 5x 30 0 B5x2 7x 12 C x2 81 D x class=](https://us-static.z-dn.net/files/dc1/e79cd39078c7b1b8895f00f3e4c5795d.png)