Question

1) square formula

* (a+b)²=a²+2ab+b²

this formula name is correct are wrong tell me ​

Answer 1

Answer:

First, we take a square, of side length a, and a rectangle of sides 18 and a, and set the total area equal to 208. Next, we cut the 18a rectangle into two pieces, and stick them onto the square, making an L. To fill in the “space” in the larger square, we add an area of 81, thus completing the square, and adding 81 to the 208 on the other side of the equation. Thus we have a square of side length 9 + a, equal to a square of area 289. So, a = 8 where,

(a+b)2=a2+2ab+b2

Next, we cut the four corners off the big square into an octagon with area,

Aoctagon=81−4×94=72

Answer 2

Step-by-step explanation:

This formula is correct.