Question

(5m+7n)²+(7m+5n)²............​

Answer 1

Answer:

this is the answer hope it helps you and plsss mark me as brainliest

Step-by-step explanation:

(5m+7n)²+(7m+5n)²

=(5m)²+(7n)²+2(5m)(7n)+(7m)²+(5n)²+2(7m)(5n)

= 25m²+49n²+70mn+49m²+25n²+70mn

= 74m²+74n²+140mn

Answer 2

Step-by-step explanation:

(5m+7n)^2= 25m^2 +49n^2+70mn

(7m+5n)^2= 49m^2 +25n^2+70mn

74m^2 +74n^2+140mn