Question

5 (5^2-d^2) = 80, so d = ?​

Answer 1

Answer:

Given that : $\large\tt 5 (5^{2} – d^{2}) = 80$

To find : d = ?

Answer : 3

Step By Step Explanation : $\large\tt 5^{2} – d^{2} = \frac {80}{5}$

$\large\tt 5^{2} – d^{2} = 16$

$\large\tt 25 - d^{2} = 16$

$\large\tt -d^{2} = –9$

$\large\tt d = \sqrt {9}$ (cut the minus symbol from both sides)

$\large\tt d = 3$