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CLASS 9 MATHS CHAPTER 2 POLYNOMIALS
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Answers
Step-by-step explanation:
Solutions:-
I) Given Polynomial P(x)=x+5
To get the zero of P(x) we write it as P(x)=0
=>x+5 = 0
=> x = -5
Zero of P(x) = x+5 is -5
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ii)Given Polynomial P(x)=x-5
To get the zero of P(x) we write it as P(x)=0
=>x-5 = 0
=> x = 5
Zero of P(x) = x-5 is 5
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iii)Given Polynomial P(x)=2x+5
To get the zero of P(x) we write it as P(x)=0
=>2x+5 = 0
=>2x = -5
=> x = -5/2
Zero of P(x) = 2x+5 is -5/2
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iv)Given Polynomial P(x)=3x-2
To get the zero of P(x) we write it as P(x)=0
=>3x-2 = 0
=> 3x = 2
=>x = 2/3
Zero of P(x) = 3x-2 is 2/3
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v)Given Polynomial P(x)=3x
To get the zero of P(x) we write it as P(x)=0
=>3x = 0
=> x = 0/3
=>x = 0
Zero of P(x) = 3x is 0
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vi)Given Polynomial P(x)=ax
To get the zero of P(x) we write it as P(x)=0
=>ax = 0
=> x = 0/a
=>x = 0
Zero of P(x) = ax is 0
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vii)Given Polynomial P(x)=cx+d
To get the zero of P(x) we write it as P(x)=0
=>cx+d = 0
=> cx = -d
=>x = -d/c
Zero of P(x) = cx+d is -d/c
--------------------------------------------------------------
Answers:-
I)Zero of P(x) = x+5 is -5
ii)Zero of P(x) = x-5 is 5
iii)Zero of P(x) = 2x+5 is -5/2
iv)Zero of P(x) = 3x-2 is 2/3
v)Zero of P(x) = 3x is 0
vi)Zero of P(x) = ax is 0
vii)Zero of P(x) = cx+d is -d/c
Used formulae:-
- P(x) is a polynomial, to get zero of P(x) then we write P(x) = 0.
Answer:
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