Question

Please help on this math question. Will be marked as BRAINLEST!

Answer 1

Answer:

20

Step-by-step explanation:

$25 \times 25 - 15 \times 15 = 400$

$\sqrt{400} = 20$

Answer 2

Answer:

b=√400

=20

Step-by-step explanation:

15^2+b^2=25^2

225 + b^2=625

b^2=625-225

b^2=400

b=√400

b=20