What is the solution set of x2 – 10 = 30x?

So for this, I will be completing the square to solve for x. Firstly, add 10 and subtract 30x on both sides of the equation:

Next, we want to make the left side of the equation a perfect square. To find the constant of this soon-to-be perfect square, divide the x coefficient by 2 and square the quotient. Once you get that result, add it to both sides of the equation:

Now, factor the left side:

Next, square root both sides:

Now, add 15 to both sides of the equation:

This is the exact solution. To find the approximate solution, solve the left side twice -- once with the plus sign, once with the minus sign:

In short:

the mean and mad

step-by-step explanation:

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers