SOLUTION: Can you help me solve this equation by completing the square? I am having a hard time figuring out the answer when the coefficient is not 1! 16x^2+40x+21=0 Thank you!

Question 443613: Can you help me solve this equation by completing the square? I am having a hard time figuring out the answer when the coefficient is not 1!
16x^2+40x+21=0
Thank you!

Answer by swincher4391(1107) (Show Source): You can put this solution on YOUR website!
Get it in the form ax^2 + bx = c

Now it is time to complete the square:
Recall that
So
Remember to balance the equation by adding what we added to complete the square to both sides.

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