Multiply and simplify: (a-b)^2 pls

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

it is contrapositive

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