Ask Me Help Desk - A right angle triangle has sides x-1, 12 and hypothenuse x + 8. Find the value of x

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A right angle triangle has sides x-1, 12 and hypothenuse x + 8. Find the value of x

Do I use the quadratic formula?

Not quite. Use the Pythagorean theorem to set up the equation

$<br /> (x-1)^2 + 12^2 = (x+8)^2<br />$

Simplify this and you'll see you can solve for x without using the quadratic equation, since the x^2 terms cancel out.

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