If (x +3 )^2 = 144, which of the following could be the value of 2x?	Choose the correct choice.
A) –26 B) –22 C) –30 D) 12 E) 13
You can also get to the answer by backsolving using answer choices   Starting with x = -15   (x + 3)^2 = 144   (-15+3)^2 = 144 =====&gt; (-12)^2 = 144 Bingo, –30learly, among the answer choices only -15 will result in 144 in the equation so x must be -11,   Then 2x = 2 * -15 = -30   Answer: –30
<result>C</result>
If (x +3 )^2 = 144, which of the following could be the value of 2x?