Question

(5l+6m) square-120lm​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

(5l+6m)^2 -120lm

$= 25 {l}^{2}+36 {m}^{2} + 60lm - 120lm \\ = 25 {l}^{2} + 36 {m}^{2} - 60lm \\ = (5l - 6m) {(5l - 6m)^{2}$

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