SOLUTION: I need help. I am taking my final exam this weekend and I am doing the practice exam. I need desperately to understand step by step how to do the following equation as I get every

Question 470144: I need help. I am taking my final exam this weekend and I am doing the practice exam. I need desperately to understand step by step how to do the following equation as I get every example wrong.
a^2+3a-28=0

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
I'm going to use the variable x instead of 'a'.

Start with the given equation.

Notice that the quadratic is in the form of where , , and

Let's use the quadratic formula to solve for "x":

Start with the quadratic formula

Plug in , , and

Square to get .

Multiply to get

Rewrite as

Add to to get

Multiply and to get .

Take the square root of to get .

or Break up the expression.

or Combine like terms.

or Reduce.

So the solutions are or

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