If (x + 10)^2 = 144, which of the following could be the value of 2x?  Choose the correct choice from the following choices: A) –26 B) –22 C) –44 D) 66 E) 13
You can also get to the answer by backsolving using answer choices   Starting with x= -22   (x + 10)^2 = 144   (-22 + 10)^2 = 144 =====&gt; (-12)^2 = 144 Bingo, –44learly, among the answer choices only -22 will result in 144 in the equation so x must be -22,   Then 2x = 2 * -22 = -44   Answer: –44
<result>C</result>
If (x + 10)^2 = 144, which of the following could be the value of 2x?