Respuesta :
Answer:
Never
Step-by-step explanation:
The product of (a − b)(a − b) is solved using the perfect square trinomial formula. This formula (for subtraction) states that (a − b)^2 = a^2 - 2ab + b^2.
- The first term of the product is always the first term of the original binomial squared.
- The middle term of the product is always positive and equal to twice the product of the first and last terms of the original binomial.
- The last term of the product is always positive and equal to the last term of the original binomial squared.
a^2 - 2ab + b^2 is NOT equal to a^2 − b^2.
So, the product of (a − b)(a − b) is NEVER a2 − b2