Home
Class 9
MATHS
One of the zeroes of the polynomial ...

One of the zeroes of the polynomial ` 2x^(2)+7x-4` is

A

`2`

B

`(1)/(2)`

C

`-(1)/(2)`

D

`-2`

Text Solution

Verified by Experts

The correct Answer is:
B
Let ` p(x) =2x^(2)+7x-4`
`=2x^(2)+8x-x-4`
`=2x(x+4)-1(x+4)`
`=(2x-1)(x+4)`
For zeroes Of `p(x)` . Put `p(x)=0`
`therefore " " (2x-1)(x+4)=0`
`implies 2x-1=0 and x+4=0`
`implies x=(1)/(2) and x=-4`
Hence , one of the zeroes of the polynomial `p(x) "is" (1)/(2)`
Promotional Banner

Topper's Solved these Questions

  • NUMBER SYSTEMS

    NCERT EXEMPLAR|Exercise SHORT ANSWER TYPE QUESTIONS|1 Videos

  • QUADRILATERALS

    NCERT EXEMPLAR|Exercise Quadrilaterals|56 Videos

Similar Questions

Explore conceptually related problems

Find zeroes of the polynomial x^(2)+2x

Find the zeroes of the polynomial: 6x^(2)-7x-3

If one of the zeroes of the polynomial f(x) = x^2 - 7x - 8 is - 1, then find the other zero.

The zeroes of the polynomial x^(2)-7 are :

The zeros of the polynomial x^(2) - 2x-3 are

Find zeroes of the polynomial x^(2)-x-2 .

The zeros of the polynomial p(x)=2x^(2)+7x-4 are

If one of the zero of the polynomial f (x) = x ^(2) - 7x - 8 is -1, then find the other zero .

Find the zeros of the polynomial p(x) = x^2 - 7x + 6

If alpha and beta are the zeros of the polynomial 2x^(2)-7x+3. Find the sum of the reciprocal of its zeros.