Question

Identity & find products: (2b-a)(2b+c)

Answer 1

\left[b _{1}\right] = \left[ \frac{a}{4}+\frac{ - c}{4}+\frac{ - \sqrt{\left( 4\,a^{2}+8\,a\,c+4\,c^{2}\right) }}{8}\right][b​1​​]=[​4​​a​​+​4​​−c​​+​8​​−√​(4a​2​​+8ac+4c​2​​)​​​​​] this is answer. Algebra functional value