(b²-3) ²

To expand the expression (b²-3)², we can use the concept of the square of a binomial. The square of a binomial is given by:

(a - b)² = a² - 2ab + b²

Using this formula, we can substitute a = b and b = 3 into the equation:

(b² - 3)² = (b²)² - 2(b²)(3) + (3)² = b⁴ - 2b²(3) + 9 = b⁴ - 6b² + 9

Therefore, the expanded form of (b² - 3)² is b⁴ - 6b² + 9.