Question

What are the solutions of the equation (x−13)2=400?

Answer 1

Answer:

       x = −7  and  x = 33

Step-by-step explanation:

$(x-13)^2=400\\\\ (x-13)^2=(\pm20)^2\\\\x-13=20\quad\vee\quad x-13=-20\\\\x=33\qquad\vee\qquad x=-7$