Class 8MathematicsAlgebraic Expressions and Identities
Standard Identities
(a+b)² = a²+2ab+b². (a-b)² = a²-2ab+b². (a+b)(a-b) = a²-b². (x+a)(x+b) = x²+(a+b)x+ab. These are called algebraic identities — true for all values of variables. Used for quick calculation without actual multiplication.
10 examples
Concept check 1
For Class 8 Mathematics, explain or solve a standard identities question from the chapter "Algebraic Expressions and Identities". Focus on concept check and show the working clearly.
Definition to application 2
For Class 8 Mathematics, explain or solve a standard identities question from the chapter "Algebraic Expressions and Identities". Focus on definition to application and show the working clearly.
Formula warm-up 3
For Class 8 Mathematics, explain or solve a standard identities question from the chapter "Algebraic Expressions and Identities". Focus on formula warm-up and show the working clearly.
Reasoning practice 4
For Class 8 Mathematics, explain or solve a standard identities question from the chapter "Algebraic Expressions and Identities". Focus on reasoning practice and show the working clearly.
Board-style short answer 5
For Class 8 Mathematics, explain or solve a standard identities question from the chapter "Algebraic Expressions and Identities". Focus on board-style short answer and show the working clearly.
Mistake correction 6
For Class 8 Mathematics, explain or solve a standard identities question from the chapter "Algebraic Expressions and Identities". Focus on mistake correction and show the working clearly.
Visual interpretation 7
For Class 8 Mathematics, explain or solve a standard identities question from the chapter "Algebraic Expressions and Identities". Focus on visual interpretation and show the working clearly.
Applied word problem 8
For Class 8 Mathematics, explain or solve a standard identities question from the chapter "Algebraic Expressions and Identities". Focus on applied word problem and show the working clearly.
Revision challenge 9
For Class 8 Mathematics, explain or solve a standard identities question from the chapter "Algebraic Expressions and Identities". Focus on revision challenge and show the working clearly.
Exam recap 10
For Class 8 Mathematics, explain or solve a standard identities question from the chapter "Algebraic Expressions and Identities". Focus on exam recap and show the working clearly.