Answer:
(1+3/2x^4)(1-3/2x^4) = (1+1.5x^4)(1-1.5x^4)
Step-by-step explanation:
2.25 = 9/4
putting decimals into fractions will make this easier
9/4 = 3/2 * 3/2
a²-b² = (a+b)(a-b)
1 - 2.25x^8 = 1²-(3/2x^4)² = (1+3/2x^4)(1-3/2x^4) = (1+1.5x^4)(1-1.5x^4)
