ressolve by splitting the middle term : l^2m^2-2lm-63
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Answered by
4
Answer:
(lm - 9) (lm + 7)
Step-by-step explanation:
l²m² - 2lm - 63
= l²m² - 9lm + 7lm - 63
= lm(lm - 9) + 7(lm - 9)
= (lm - 9) (lm + 7)
Answered by
0
Answer:
(lm - 9) (lm + 7)
Step-by-step explanation:
l²m² - 2lm - 63
= l²m² - 9lm + 7lm - 63
= lm(lm - 9) + 7(lm - 9)
= (lm - 9) (lm + 7)
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