Completing the square, and rationalising substitutions
Any quadratic becomes $au^2 + q$ after a shift, and a root of a linear expression becomes rational when you substitute for the root itself.
About 25 minutes7 activities Paper packet
Any quadratic becomes $au^2 + q$ after a shift, and a root of a linear expression becomes rational when you substitute for the root itself.
About 25 minutes7 activities Paper packet