Ros (
girlyswot.livejournal.com
) wrote
in
girlyswot
2008-12-01 09:54 pm (UTC)
no subject
You have to multiply both terms in each bracket with both terms in the other bracket.
So it's:
x by x = x^2
x by -1 = -x
2 by x = 2x
2 by -1 = -2
The second and third terms can be combined to give: x^2 + x -2
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no subject
So it's:
x by x = x^2
x by -1 = -x
2 by x = 2x
2 by -1 = -2
The second and third terms can be combined to give: x^2 + x -2