Answer:(a² - 4b² - 9)(a² - 4b² + 9)
(a^4 - 8a²b² + 16b^4) - 81
= [(a²)² - 2.4a²b² + (4b²)²] - 9²
= (a² - 4b²)² - 9²
= (a² - 4b² - 9)(a² - 4b² + 9)
Step-by-step explanation:
12-12x+7=100
-12x+19=100
-12x=81
x=-27/4
3 yards= 108 in. You have to divide 108 by 18 3/8. So it would be about 5 frames.
So 3 *3=9 so 9*4=36 hope I helped
