Lesson deck
AlgebraCommon
The difference of two squares
The cut out square turned into a rectangle, x + 7 by x − 7, then a big square with a small square cut from the corner. Square root each term, then one bracket with a plus and one with a minus. Then a different letter, the number first, a number in front of x squared and 51 squared take away 49 squared.
A free GCSE Foundation and Higher algebra lesson on the difference of two squares, spec code A4. It has a lesson deck to teach from with a visualiser, a worksheet with answers, an exit ticket and end of unit tests.
Common
The difference of two squares
Exit ticket
The difference of two squares
Test
Quadratics and formulae test:Foundation A
Test
Expanding, factorising and quadratics test:Higher
More in Expressions and formulae
- Expression, equation, formula or inequality?Lesson · Support
- Expression, equation, formula or inequality?Lesson · Foundation
- Algebraic notation: multiplyingLesson · Support
- Algebraic notation: multiplyingLesson · Foundation
- Collecting like termsLesson · Support
- Collecting like terms: grouping lettersLesson · Support
- Collecting like termsLesson · Foundation
- Expanding single bracketsLesson · Support
- Expanding single bracketsLesson · Foundation
- Equation or identity?Lesson · Common
- Four Fours: index lawsPuzzle
- Key words: algebraWorksheet · Foundation
- Four Fours: algebraic notationPuzzle
- Ramp up: algebraic notation and vocabularyWorksheet · Foundation