Question

The zeroes of the polynomial x2 + x – 2 are

(a) 1, 2 (b) –1, –2 (c) 1, – 2 (d) –1, 2​

Answer 1

Answer:

x²+x-2=x²+2x-x-2=x(x+2)-1(x+2)=(x-1)(x+2); Hence the zeros are 1,-2(c); Please mark the answer as brainliest.

Answer 2

(c) 1, - 2

The zeroes of the polynomial $x^{2}+x-2$ are (- 2) and 1.

Given data:

The polynomial $x^{2}+x-2$

To find:

Its zeroes

Concept to be used:

If any quadratic polynomial has two factors of the form $(x-a)$ and $(x-b)$, then its zeroes are $a$ and $b$.q

Step-by-step explanation:

The given polynomial is

$x^{2}+x-2$

• Hint. We factorize the given polynomial and find two factors.

$=x^{2}+(2-1)x-2$

$=x^{2}+2x-x-2$

$=x(x+2)-1(x+2)$

$=(x+2)(x-1)$

So, the given polynomial has two factors $x+2=x-(-2)$ and $(x-1)$.

Hence its two zeroes are (- 2) and 1.

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