Question
Subtract the second expression from the first:
$3a^2 - 8ab - 2b^2 , 3a^2 - 4ab + 6b^2$
$3a^2 - 8ab - 2b^2 , 3a^2 - 4ab + 6b^2$
✓
Answer
$(3a^2 - 8ab - 2b^2) - (3a^2 - 4ab + 6b^2 )$
$= 3a^2 - 8ab - 2b^2 - 3a^2 + 4ab - 6b^2$
$= 3a^2 - 3a^2 - 2b^2 - 6b^2 - 8ab + 4ab$
$= 0 - 8b^2 - 4ab$
$= - 4ab - 8b^2$
$= 3a^2 - 8ab - 2b^2 - 3a^2 + 4ab - 6b^2$
$= 3a^2 - 3a^2 - 2b^2 - 6b^2 - 8ab + 4ab$
$= 0 - 8b^2 - 4ab$
$= - 4ab - 8b^2$
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