Question

can u tell how ( tell how)

Answer 1

Hola User_____________

Here is Your Answer ......!!!!!
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☆ Actually welcome to the concept of Quadratic inequalities. ...

☆Basically here after solving the quadratic of...... k^2 - 16 >= 0
we get the two roots that are
(K+4) (k-4)>=0......

☆Now as the degree of equation is 2....so definitely we will get two roots of this equation.,,,,

☆so equating simultaneously both by zero we get .......

K >= 4 and K >= -4......

-4 >= -k is also same as k>= 4
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Hope it helps u.....☺

Answer 2

hey friend!!!?
according to your doubt..

I will take your doubt full step..

so

now
K²-4² ≥ 0

WE KNOW THAT => ( A²-B²) = (A+B)(A-B)

USING THIS PROPERLY
WE GET:

(K+4)(K-4)≥0

then

K ≥ -4. or. K ≥ 4

we take "K≥4"

then => K≤-4

hope it will help you..