Question

middle term factor 4s² - 4s +1​

Answer 1

the factor of 4s square -4s +1

Answer 2

${4s }^{2} - 4s + 1 \\ {4s}^{2} - 2s - 2s + 1 \\ 2s(2s - 1) - 1(2s - 1) \\ (2s - 1)(2s - 1) \\ then \\ s = \frac{1}{2}$