Option C.
No matter how much n decreases, -1 will always be bigger than 9n.
The elements of (A n B)' are ( 3, 4 , 5 ,6). Option A
<h3>How to determine the set</h3>
The elements of this set (A n B) explains the common elements of both sets without repetition
Set A = 3, 4
Set B = 5, 6
A n B = 1, 2
(A n B)' = Is the elements both A and B in common but is not found in the universal set
(A n B)' = ( 3, 4 , 5 ,6)
Thus, the elements of (A n B)' are ( 3, 4 , 5 ,6). Option A
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<span>f(x)=4x²-15x-25
</span><span>f(x)=(4x + 5)(x - 5)
</span><span>zero-product property
let </span>f(x)=(4x + 5)(x - 5) = 0
so
(4x + 5)(x - 5) = 0
4x +5 = 0
4x = -5
x = -5/4
x = -1.25
x - 5 =0
x = 5
answer
factor: (4x + 5)(x - 5)
x = 5 and x = -1.25