Algebra-1

To expand and simplify (d - 3)(d + 3), we can use the formula for multiplying binomials:

(a - b)(a + b) = a² - b²

In this case, a is "d" and b is "3". Substituting these values into the formula, we get:

(d - 3)(d + 3) = d² - 3²
  &nbs...