square of a certain number decreased by 9 times the number is 36 . what is the number
Goodness. You have to start to try these, and let us critique. There is nothing like the mind working on its own.
N^2-9= what
bob, appreciate the sentiment, but if i could figure it out, i wouldn't be asking for help. this is like korean to me. i don't get it. but thanks for the thought
No problem! I'll be happy to help you understand how to solve this problem step-by-step.
Let's break down the information given:
- The square of a certain number: N^2
- Decreased by 9 times the number: -9N
- Equals 36: = 36
Putting all of this together, we can create an equation:
N^2 - 9N = 36
To solve this equation, we need to bring all terms to one side and set it equal to zero:
N^2 - 9N - 36 = 0
Now, we can solve this quadratic equation by factoring, completing the square, or using the quadratic formula. In this case, let's try factoring:
(N - 12)(N + 3) = 0
To find the value of N, we set each factor equal to zero and solve for N:
N - 12 = 0 or N + 3 = 0
Solving these two equations, we get:
N = 12 or N = -3
Therefore, the possible solutions for the number N are 12 or -3.