# What is the standard form of  y=(11x - 1)(11 - x) ?

Jan 31, 2016

$- 11 {x}^{2} + 122 x - 11$

#### Explanation:

each term in the 2nd bracket must be multiplied by each term

in the 1st bracket.

written 11x (11 - x ) - 1 (11 - x )

multiply the brackets : $121 x - 11 {x}^{2} - 11 + x$

collect 'like terms ' : $- 11 {x}^{2} + 122 x - 11$

This is the expression in standard form.