Question

Find the zero of the polynomial in each of the following cases
(i) p(x) = x + 5
(ii) p(x) = x – 5
(iii) p(x) = 2x + 5

Answer 1

Step-by-step explanation:

(i) So,  

p(x) = x + 5

x + 5 = 0  

x = -5  

Thus, -5 is the zero

(ii) So,

P(x) = x - 5

x - 5 = 0  

x = 5

Thus, 5 is the zero

(iii) So,

p(x) = 2x + 5

2x + 5 = 0  

2x = -5  

x = $\frac{-5}{2}$

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Lilac584

Answer 2

Answer:

i) -5

ii) 5

iii) -5/2

Step-by-step explanation:

p(x) = 0

i) x + 5 = 0

x = -5

ii) x - 5 = 0

x = 5

iii) 2x + 5 = 0

=> 2x = -5

x = -5/2