EDGS 646 Index

Level 2 Help for Problem One

x = 2 and x - 2 = 0 are 'equivalent' equations (with the same solution).

We produce one from the other by subtracting 2 from both sides.

But when we SQUARE both equations, we produce x² = 4
and (x - 2)² = 0.

Back to Problem One?

EDGS 646 Index