Answer:
area = (a + b)² = a² + 2ab + b²
Step-by-step explanation:
let side length = a + b
area of a square = side length × side length
⇒ area = (a + b)²
= (a + b)(a + b)
= a² + ab + ab + b²
= a² + 2ab + b²
Expression:
a x b = x
Expand:
Subtract x from both sides
axb - x = x - x
Simplify:
axb - x = 0
Factor axb:
x(ab -1) = 0
x = 0
