Question

the zero of the polynomial x square - 3 x - m (m + 3) are​

Answer 1

Answer:

-m,-(m+3)

Step-by-step explanation:

its question of maths exam 2020, mcq

option d is correct

Answer 2

The zeros of the polynomial are - m , m + 3

Given :

The polynomial x² - 3x - m(m + 3)

To find :

The zeroes of the polynomial

Solution :

Step 1 of 2 :

Write down the given polynomial

Here the given polynomial is

x² - 3x - m(m + 3)

Step 2 of 2 :

Find zeroes of the polynomial

For zeroes of the polynomial we have ,

x² - 3x - m(m + 3) = 0

⇒ x² - 3x - m² - 3m = 0

⇒ x² - m² - 3x - 3m = 0

⇒ (x + m)(x - m) - 3(x + m) = 0 [ ∵ a² - b² = (a + b) (a - b) ]

⇒ (x + m)(x - m - 3) =0

Now ,

x + m = 0 gives x = - m

x - m - 3 = 0 gives x = m + 3

Hence zeros of the polynomial are - m , m + 3

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