CBSE Class 9 Algebraic Identities — practice questions
32 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 9 Algebraic Identities in the app →The algebraic identity (a + b)² is equal to:The identity (a − b)² is equal to:The identity (a + b)(a − b) equals:Use an identity to compute 102² quickly:Compute 98² using an identity:Compute 47 × 53 using an identity:Factorise: 9x² − 25y²:Find the value of x² + y² if x + y = 10 and xy = 21:If a + b = 7 and a − b = 3, find a² − b²:Find (x − 1/x)² if x + 1/x = 4:Is (a + b)² > a² + b² always true for non-zero a, b?Expand (2x + 3y)²:An algebraic identity is true for:The expansion of (a + b)2 is:The expansion of (a - b)2 is:The identity a2 - b2 equals:Identities can be visualised using models that are:(x + 3)(x + 4) expands to:x2 + 7x + 12 factors into:x2 + 4x + 4 has which factor?36x2 + 12x + 1 is the square of:To factor 50p2 + 60pq + 18q2, first take out:The expansion of (a + b + c)2 includes which terms?Which identity helps compute 119 squared quickly?An identity differs from an equation because it holds for:(a + b)2 is verified using which property?In (x + a)(x + b), the coefficient of x is:In (x + a)(x + b), the constant term is:Using a2 - b2, the value of 51 squared minus 49 squared is:Who proposed the identity used to compute squares quickly in 750 CE?Expanding (a + b + c)2 gives how many squared terms?After taking out 2, the expression 25p2 + 30pq + 9q2 is the square of: