Question

PLEASE HELP WITH 1ST ONE

Answer 1

Answer:

5

Identities used are-

a²-b²=( a+b)(a-b)

see the above picture for complete and detailed step by step answer.

Answer 2

Answer:

5

Step-by-step explanation:

$\frac{ \: (5.27)² - (0.27)²\: }{5.54}$

$\frac{(5.27 + 0.27) \: (5.27 - 0.27)}{5.54}$

$\frac{5.54 \: \times \: 5}{5.54}$

here you can cancel out 5.54 from both...

hence the answer will be 5