Answer:
a² - 2ab + b²
Step-by-step explanation:
(a – b)² = (a – b)(a – b)
We can use the FOIL method of multiplying two binomials
First terms: a × a = a²
Outer terms: (-b) × (-b) = b²
Inner terms: -b × a = -ab
Last terms: a × (-b) = -ab
Sum = a² - 2ab + b²
