Consider,

. Let's say

then the problem reduces to

. (Do you understand this step?)
So then replacing a again with our definition we get,

.
Answer:
580
Step-by-step explanation:
because you square the area and identify
Answer:
In the pictures linked.
Step-by-step explanation:
The pictures I linked have the answers. Brainly wouldn't let me submit it because I apparently used bad words.
Answer:
He has 5 children
Step-by-step explanation:One boy is a brother to all of them