Answer:
see explanation
Step-by-step explanation:
ab = (2x - 3)(2x + 3) ← expand factors using FOIL
ab = 4x² + 6x - 6x - 9 ← collect like terms
ab = 4x² - 9 ( add 9 to both sides )
ab + 9 = 4x² ( divide both sides by 4 )
[tex]\frac{ab+9}{4}[/tex] = x², or
(ab + 9) ÷ 4 = x²
