In this resource, we are going to explore a method for factorising quadratic expressions using multiplication grids. We begin with a warm-up activity, which explores multiplication grids and builds up some of the ideas required for the factorising problem.
This multiplication grid for expanding \((x+4)(2x-3)\) is partially filled in. Fill in the rest of the grid to expand the brackets.
What patterns do you notice in the grids as you expand the following brackets using this method?
How could this help in factorising quadratics?