- #1
Erectable
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I might not be the brightest bob in the bunch but I am having trouble with a simple quadratic equation.
k^2 + (k + 4)^2 = 346
According to my manual expands to:
k^2 + k^2 + 8k + 16 = 346
Everything is going fine until I see the 8k. Where did the 8k come from? Or is my manual wrong?
If anyone is willing to aid a poor soul with his maths I would be very grateful.
k^2 + (k + 4)^2 = 346
According to my manual expands to:
k^2 + k^2 + 8k + 16 = 346
Everything is going fine until I see the 8k. Where did the 8k come from? Or is my manual wrong?
If anyone is willing to aid a poor soul with his maths I would be very grateful.