Expanding two brackets - using the grid method
Use a multiplication grid to expand two brackets.
- Write the terms from one factor down the side and the terms from the other across the top.
- Keep the positive or negative sign with each term.
- Multiply each row heading by each column heading to fill every cell.
- Add the cell products, then collect like terms.
Example 1
Expand and simplify using the grid method.
Add the products and collect like terms.
Example 2
Multiply out the brackets using a grid, then collect like terms.
Add the products and collect like terms.
Remember
Every cell represents one multiplication. Keep the sign of each product.
Your turn
Expand and simplify using the grid method.
Check answer
Add the products and collect like terms.
Expand and simplify using the grid method.
Check answer
Add the products and collect like terms.
Expand and simplify using the grid method.
Check answer
Add the products and collect like terms.
Expand and simplify using the grid method.
Check answer
Add the products and collect like terms.
Expand and simplify using the grid method.
Check answer
Add the products and collect like terms.
Expand and simplify using the grid method.
Add the products and collect like terms.
Expand and simplify using the grid method.
Add the products and collect like terms.
Expand and simplify using the grid method.
Add the products and collect like terms.
Expand and simplify using the grid method.
Add the products and collect like terms.
Expand and simplify using the grid method.
Add the products and collect like terms.