Question

Please do it step by step
please give the correct answers ​

Answer 1

Answer:

hey mate your answer is...

Step-by-step explanation:

$(7n + 8m) {}^{2} + (7n - 8m) {}^{2} \\ = 49n {}^{2} + 112nm + 64m {}^{2} + 49n {}^{2} - 112nm + 64m {}^{2} \\ = 98n {}^{2} + 128m {}^{2} ....... \\ hope \: its \: helps.....$

Answer 2

Step-by-step explanation:

See the image you answer is below and if answer is matched follow me