The diagram shows squares arranged around the edge of a right triangle. What is the area of square B

What are the soultion(s) to the quadratic equation 40- x^2=0

I'm confused on this could anyone me and show me what i need to do to solve it.

Areflection of shape i across the y-axis, followed by a , and then a translation left 6 units and down 4 units confirms congruence between shape i and shape ii. alternatively, a of shape ii about the origin, followed by a reflection across the y-axis, and then a translation right 4 units and up 6 units confirms congruence between shape ii and shape i.