Advertisements
Advertisements
प्रश्न
Mark the correct alternative in each of the following:
If x − 2 is a factor of x2 + 3ax − 2a, then a =
पर्याय
2
-2
1
-1
Advertisements
उत्तर
As (x -2)is a factor of `f(x) = x^2 +3ax - 2a`
i.e. f(2) = 0
`(2)^2 +3a (2) -2a = 0`
`4 +6a -2a = 0`
` = -1`
APPEARS IN
संबंधित प्रश्न
Write the coefficient of x2 in the following:
`pi/6x^2- 3x+4`
Identify polynomials in the following:
`f(x)=4x^3-x^2-3x+7`
Identify polynomials in the following:
`p(x)=2/3x^3-7/4x+9`
Identify polynomials in the following:
`q(x)=2x^2-3x+4/x+2`
In the following two polynomials, find the value of a, if x − a is factor x6 − ax5 + x4 − ax3 + 3x − a + 2.
If x3 + ax2 − bx+ 10 is divisible by x2 − 3x + 2, find the values of a and b.
If both x + 1 and x − 1 are factors of ax3 + x2 − 2x + b, find the values of a and b.
x4 − 2x3 − 7x2 + 8x + 12
Factorise the following:
5x2 – 29xy – 42y2
Factorise the following:
`sqrt(5)"a"^2 + 2"a" - 3sqrt(5)`
