Download App

Polynomials — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsPolynomials1 Mark
MCQ
The zeros of the polynomial $ p(x) = 2x^2 + 7x - 4 $ are:
  • A
    $4,\frac{-1}{2}$
  • B
    $4,\frac{1}{2}$
  • ✓
    $-4,\frac{1}{2}$
  • D
    $-4,\frac{-1}{2}$
✓

Answer

Correct option: C.
$-4,\frac{1}{2}$
$ p(x) = 2x^2 + 7x - 4$
Now, $p(x) = 0$
$⇒ 2x^2 + 7x - 4 = 0$
$⇒ 2x^2 + 8x - x - 4 = 0$
$⇒ 2x(x + 4) - 1(x + 4) = 0$
$⇒ (x + 4)(2x - 1) = 0$
$⇒ x + 4 = 0$ and $2x - 1 = 0$
$⇒ x = -4 $and $\text{x}=\frac{1}{2}$

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

The sides of a triangle are 11 cm, 15 cm and 16 cm. The altitude to the largest side is
→
If $a^2+b^2+c^2-a b-b c-c a=0$, then:
​​​​​​
→
The distance between the graphs of the equations y = - 1 and y = 3 is
→
Three angles of a quadrilateral are $80^{\circ}, 95^{\circ}$ and $112^{\circ}$. Its fourth angle is:
→
Which of the following polynomials has $(-3)$ as a zero$?$
→
If $AB, BC$ and $CD$ are equal chords of a circle with $O$ as centre and $AD$ diameter, than $\angle\text{AOB}=$
→
Write the correct answer in the following: In a survey of $364$ children aged $19-36$ months, it was found that $91$ liked to eat potato chips. If a child is selected at random, the probability that he/ she does not like to eat potato chips is:
→
The value of $\sqrt{3-2 \sqrt{2}}$ is
→
If $\text{a}=7-4\sqrt{3},$ then the value of $\sqrt{\text{a}}+\frac{1}{\sqrt{\text{a}}}$ is:
→
$(a - b)^3 + (b - c)^3 + (c - a)^3 =$
→