Algebraeasy · Past Paper
Multiply (x + 1) and (x - 1).
Ax^2 + 1
Bx^2 - 1
Cx^2 + 2x + 1
Dx^2 - 2x + 1
✓ Correct Answer: B — x^2 - 1
Apply (a+b)(a-b) = a^2 - b^2.
Share this question
More from Algebra
- If 4x = 0, what is x?
- The difference between two supplementary angles is 20 degrees. Find the larger angle.
- A and B together have Rs 1210. If 4/15 of A's amount is equal to 2/5 of B's amount, find B's amount.
- The sum of digits of a two-digit number is 12. The number obtained by interchanging the digits exceeds the original number by 18. Find the number.
- The sum of a number and its double is 21. What is the number?