Question

Page No
Date
IF 5 is a zero of the quadratic
Palynomials x² - kx - 15 is then the value
of k is
a)2 b)-2​

Answer 1

Answer:

answer is a) 2

Step-by-step explanation:

as 5 is the zero of p(x)=x^2 -kx-15

then (5)^2-(5)k-15=0

on further solving

the value of k comes to be 2

Answer 2

$polynomial \: = {x}^{2} - kx - 15 \\ since \: 5 \: is \: a \: zero \: of \: the \: poynomial \\ so \: putting \: x = 5 \:in \: polynomial \\ = > {5}^{2} -5 k - 15 = 0 \\ 25 - 15 = 5k \\ 10 = 5k \\ = > k = 2$

Hope it is helpful