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Question
Add:
13x2 − 12y2; 6x2 − 8y2
Sum
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Solution
(13x2 − 12y2) + (6x2 − 8y2)
= 13x2 − 12y2 + 6x2 − 8y2
= (13x2 + 6x2) + (−12y2 − 8y2)
= 19x2 + (−20y2)
= 19x2 − 20y2
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