Posted by: Santosh.s on 08.08.2017
(x+5)=0 or (x-3)=0
x=-5 or x=3
Apologies for posting the different answer here. Accidentally it got happen. Kindly consider this solution:
use splitting the middle term:
Steps are mentioned below:
Zeroes of polynomial means the roots of polynomial.
X^2 + 2X-15
X^2 + (5-3)X - 15
X^2 + 5X - 3X - 15
Therefore the roots are -5 and 3
Zeroes of a polynomial means roots of the polynomial
By splitting midle term, given polynomial = (x+5) (x-3)
Therefore roots are 3 and -5
x^2+2x-15 = x^2+5x -3x-15 = x(x+5)-3(x+5) = (x+5)(x-3)
therefore the zeros of the polynomial are 3, -5
Hence option 4 is the correct ans.
= x2 + 2x - 15
= x2 + 5x - 3x -15
= x(x+5) -3(x+5)
Therefore zeroes are x+5 = 0 or x - 3 = 0
-5 and 3 are the zeroes of the given expression
x^2 + 2x - 15 = 0
x^2 + 5x - 3x - 15 = 0
x(x + 5) - 3(x + 5) = 0
(x - 3)(x + 5) = 0
Hence, zeroes of the polynomial = 3, -5
Option 4 is correct.
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