Question

evaluate : (7m-n/6)(7m-n/6)​

Answer 1

Answer:

49m^2-14mn+n^2

Step-by-step explanation:

=7m(7m-n)-n(7m-n)

=49m^2-7mn-7mn+n^2

=49m^2-14mn+n^2

Answer 2

Answer:

98m^2 +128n^ 2

Step-by-step explanation:

7m−8n)^2 +(7m+8n)^2

Using,

(a−b)^2 =a^2 −2ab+b ^2

(a+b)^2 =a^2 +2ab+b^2 we get,

=[(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

hope it'll be helpful.....❤️