simplify (7m-6n)^2 (7m+6n)^2
Answers
Answered by
15
Answer
Given, (7m−8n)
2
+(7m+8n)
2
.
We know, (a−b)
2
=a
2
−2ab+b
2
and (a+b)
2
=a
2
+2ab+b
2
.
Then,
(7m−8n)
2
+(7m+8n)
2
=[(7m)
2
−2(7m)(8n)+(8n)
2
]+[(7m)
2
+2(7m)(8n)+(8n)
2
]
=(49m
2
−112mn+64n
2
)+(49m
2
+112mn+64n
2
)
=49m
2
−112mn+64n
2
+49m
2
+112mn+64n
2
=98m
2
+128n
2
.
Mark me as brainlist
Similar questions