Factorization of Standard Quadratic Expression Using Multiplication Frame (with explanation of steps)

This activity suitable for initial teacher centred explanation, followed by student self directed mastery learning. Original source : https://www.geogebra.org/m/WgE3VWQb by Ishak_Hassan@SG Modified to a. improve readability of final answers eg. (1x+3)(-1x-2) as (x+3)(-x-2). b. give warning for expressions that cannot be factorized easily with rational numbers. Updated 24 Feb 2022. g_m in text m updated, so display of coefficient is corrected Updated 1 May 2026 : Now a 20 question set with steps showing how to do as before. Updated 20 Oct 2026 for error in factorization. Error in coefficients g_o, g_r, g_m and g_n when the product g_r*g_n = 1 and with g_r and g_n both < 0. Used command Factors( a x^2 + b x + c) to factorize it and created 2D list called m1, so that the correct factors can be solved