Question

simplify (7x - 8y )² +( 7x + 8y)²​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

(7x-8y)^2+(7x+8y)^2

=2{(7x)^2+(8y)^2} (a-b)^2+(a+b)^2=2(a^2+b^2)

=2(49x^2+64y^2)