SOLUTION: Can you help me double check this using the quad formula?:
x^2 - 10 - 1 = -10
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Question 86539: Can you help me double check this using the quad formula?:
x^2 - 10 - 1 = -10
Answer by praseenakos@yahoo.com(507) (Show Source): You can put this solution on YOUR website!
Hope your question is like this ...
Answer:
Factorisation method
Add 10 to both sides of the equation....
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You can split the middle term as follows...
Here remember that you have to find out two numbers whose sum is -10(that is coefficient of x and whose product is +9(that is the constant term....
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==>
Here (x-9) is common to both the terms....so you can take it outside...
==> (x - 9 ) ( x- 1) = 0
==> either (x-9) =0 or (x-1) = 0
==> x = 9 or x = 1
So the solution is x = 9 or x = 1
Using Quadratic formula...
Question can be written as
then the solution is given by,
where a = 1, b= -10 and c = +9
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==>
==>
==>
==> or
==> or
==> or
So the solution is x = 9 or x = 1
Hope you found the explanation useful......
Regards...
Praseena.
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