When 9 is subtracted from the square of a number, the result is 8 times the number. find the negative soulution. plz fast

The negative solution  k = -1 is the desired solution.

Step-by-step explanation:

Let the given number = k

So, according to the question:

or,

Now, solving this quadratic equation, we get

or, k ( k-9) + 1 (k-9) = 0

⇒( k-9)(k+1)  = 0

or, ( k-9)  = 0 , or (k+1)  = 0

⇒  k  = 9  or  k  = -1

Since we only want the negative solution , the k = -1 is the desired solution.

step-by-step explanation:

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2