Question

if 5²+x²+30²≈31² find x

Answer 1

Answer:

x²= -4²

Step-by-step explanation:

5²+x²+30²=31²

x²=31²-5²-30²

x²= -4²

Answer 2

Answer:

x^2 = 31^2 - 30^2 -5^2

x^2 = (31+30)(31-30) - 25                       using identity : a^2 - b^2 = (a+b)(a-b)

x^2 = 61 - 25

x^2 = 36

x = 6