Algebramedium · Past Paper
If the HCF of two expressions is (x - 3) and their LCM is (x^2 - 9)(x + 2), and one expression is (x^2 - 9), find the other.
A(x-3)(x+2)
B(x+3)(x+2)
C(x-3)
D(x^2-9)
✓ Correct Answer: A — (x-3)(x+2)
Other expression = (HCF * LCM) / First = ((x-3) * (x^2-9)(x+2)) / (x^2-9) = (x-3)(x+2).
Share this question
More from Algebra
- The discriminant of the equation √3x^2 + 10x - 8√3 = 0 is:
- Solve for x: 0.2x + 0.5 = 1.3
- If α, β are roots of x^2 + x + 1 = 0, find αβ.
- A two-digit number is such that the sum of its digits is 9. If the digits are interchanged, the number increases by 9. Find the number.
- If x^2 + 1/x^2 = 7, find x + 1/x (for positive x).