simplify the following (3l-2m+n)²+(3l-2m-n)²
Answers
Answered by
0
Step-by-step explanation:
(31-2m+n)2+(31-2m-2)2
61-4m+2n+61-4m-4
121-8m+2n-4
brainlisted plss
Answered by
1
Answer:
(3l-2m+n)(3l-2m+n) + (3l-2m-n)(3l-2m-n)
=9l²-6lm+3ln-6lm+4m²-2mn+3ln-2mn+n²+9l²-6lm-3ln-6lm+4m²+2mn-3ln+2mnn+n²
=9l²+9l²+4m²+4m²+n²+n²-6lm-6lm-6lm-6lm+3ln+3ln-3ln-3ln-2mn-2mn+2mn+2mn
= 18l²+8m²+2n²-24lm+6ln-6ln-4mn+4mn
= 18l²+8m²+2n²+24lm
Similar questions