I'm pretty sure it's a prime number.
2x² - 128
2(x² - 64), but (x² - 64) = x² - 8² (difference of 2 squares),[a²-b²=(a-b)(a+b)]
2(x² - 64) = 2(x² - 8²) = 2(x-8)(x+8)
The answer is -271/4x + 681/2
She had none left. if she only had a meter and then used a meter there would be none left.
