# What is the standard form of y= (25x + 1)(x - 1) ?

$25 {x}^{2} - 24 x - 1$
25x(x - 1 ) + 1(x - 1 ) = $25 {x}^{2} - 25 x + x - 1$
collect like terms to obtain : $25 {x}^{2} - 24 x - 1$