Question 1135385
Explain why the first step in solving the equation √(x+7)-√x=1 is not to square each side of the equation. Then what is the first step? DO NOT SOLVE THE EQUATION.
<pre>Because you'll be left with a left-side of: {{{matrix(1,5, (sqrt(x + 7) - sqrt(x))^2, "=====>", x + 7 - 2sqrt(x) * sqrt(x + 7) + x, "=====>", 2x + 7 - 2sqrt(x)sqrt(x + 7))}}}
This could prove to be quite a challenge for some, to continue onto the solution.