<p>I'm in the blue book and there's a math question I'm stumped on:</p>
<p>Sqrroot(x^2-y^2) = 2t-x</p>
<p>If x and t are positive numbers that satisfy the equation above, what is the value of x/t?</p>
<p>It's a grid in and the answer is 5/4, but I dunno how they got that.</p>
<p>you copied the question wrong
it’s sqrt(x^2 - t^2) = 2t - x</p>
<p>square both side so you have x^2 - t^2 = 4t^2 - 4tx + x^2</p>
<p>subtract x^2 from both sides, add t^2 to both sides so you have 5t^2 - 4tx = 0</p>
<p>add 4tx to both sides, divide by t^2 so you have 5 = 4x/t</p>
<p>divide by 4 on both sides so x/t = 5/4</p>
<p>MAGIC</p>
<p>Thaaaanks! :)</p>