Download App

Polynomials — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsPolynomials1 Mark
MCQ
If x + 3 is a factor of x2 - ax - 15, then a =
  • A
    -5
  • B
    -2
  • C
    5
  • D
    3
✓

Answer

  1. -2
    Solution:
    Put x - 3 = 0, then x = 3
    Therefore, value of x2 - ax - 15 at x = 3 is zero
    ⇒ 32 - 3a - 15 = 0
    ⇒ -6 - 3a = 0
    ⇒ a = -2

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q" from Polynomials→Polynomials — all question types→Maths STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Write the correct answer in the following:
The angles of a triangle are in the ratio 5 : 3 : 7 The triangle is.
→
An isosceles right triangle has an area of 8cm2. The length of its hypotenuse is:
→
The point on the graph of the linear equation 2x + 5y = 19, whose ordinate is $1^{\frac{1}{2}}$ times its abscissa is:
→
A point whose abscissa is - 3 and ordinate 2 lies in
→
Straight line passing through the points (-1, 1), (0, 0) and (1, -1) has equation.
→
In Quadrilateral ABCD, $\angle\text{A}+ \angle\text{C} = 140^\circ, \ \angle\text{A} : \angle\text{C} = 1 : 3$ and $\angle\text{B} : \angle\text{D} = 5 : 6.$ Find the values of $\angle\text{A}, \ \angle\text{B},\ \angle\text{C}$ and $\angle\text{D}?$
→
If a = 2, b = 3, then the value of (ab + ba)-1 is:
→
Which of the following statements is false?
→
The base of an isoscale triangle is 16cm and its area is 48cm2. The perimeter of the triangle is:
→
The ratio of the volume of a right circular cylinder and a right circular cone of the same base and height, is
→