Question

(9-d) (9+d) × 9 = 504

Find value of d ​

Answer 1

Answer:

d=+ or -5

thank you for the question

Answer 2

Answer:

√37

Step-by-step explanation:

As, (a-b)(a+b) = a*a + b*b

9*9 - d*d = 504/9 = 56

d*d = 81 - 56 = 37

d = √37