Answer:
x²(9x– 11)(9x + 11)
Step-by-step explanation:
81x⁴ – 121x²
The expression can be factorised as follow:
81x⁴ – 121x²
x² is common to both term. Thus:
81x⁴ – 121x² = x²(81x² – 121)
Recall:
81 = 9²
121 = 11²
Therefore,
x²(81x² – 121) = x²(9²x² – 11²)
= x²[(9x)² – 11²]
Difference of two squares
x²(9x– 11)(9x + 11)
Therefore,
81x⁴ – 121x² = x²(9x– 11)(9x + 11)
<h2><u><em>
Answer: A) f (x) = (x-5) (x+8)
</em></u></h2><h2><u><em>
</em></u></h2>
<u><em /></u>
<h2><u><em>
Step-by-step explanation: Please tell me if this is wrong! Bye! Have a good day!</em></u></h2>
Find the mode of 3, 6, 4, 3, 2, 4, 7, 8, 6, 3, 9
lions [1.4K]
Answer:
3 is the mode because it appears most often.
Step-by-step explanation:
4(2 - x) > -2x - 3(4x + 1)
8 - 4x > -2x - 12x - 3
-4x + 2x + 12x > -3 - 8
10x > -11
x > -11/10
x > -1.1
Therefore, x = 0 and x = 10 zre solutions to the inequality.
