Question

simplify (7a-6b+5c)2 +(7a+6b-5c)2​

Answer 1

Answer:

(7a – 6b + 5c)2 +(7a + 6b – 5c)2 = [(7a)2 +(- 6b)2 +(5c)2 +{2 ×(7a)×(- 6b)} +{2 ×(- 6b)× (5c)} +{2 ×(7a)×(5c)} ] + [(7a)2 +(6b)2 +(- 5c)2 +{2 ×(7a)×(6b)} +{2 ×(6b)× (- 5c)} +{2 ×(7a)×(-5c)} ]

Answer 2

Step-by-step explanation:

=14a-12b+10c+14a+12b-10c

=28a