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start by expanding your brackets on either side of the equation. Simply multiply what outside the bracket by what is inside:
2k*k - 2k*1 = k*2k + k*1
\[2k^2-2k=2k^2 + k\]
then subtract \[2k^2\] from either side of the equation
This will leave you with
divide both sides of the equation by k
and we already know that -2 cannot equal 1
Therefore we can conclude that
but when you subtracted 2k^2 what happened to the 2 exponent?
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what do you mean "what happened to the 2 exponent?" it was totally subtracted out of both sides of the equation. similar to the following scenario:
if we have: x+5 = x+10x
we can subtract the positive x from both sides, this will leave us with
does this make sense?
basically we have dropped the x from both sides of the equation so that both sides are still equal and simplified
okay let me just go back to the equation real quick and make sure I get what you're saying