Answer:
4x + 9 ≥ 0
Step-by-step explanation:
The inside of the square root, the radicand, cannot be negative.
It can only be zero or positive.
Zero or positive is also described as being greater than or equal to 0.
Set the radicand to be greater than or equal to zero.
4x + 9 ≥ 0
Answer:
y=(x+1)(x-1)(x+8)
Step-by-step explanation:
When creating a factor with a known zero, use (x-ZERO)
For instance: a zero of -1 would be reprsented as (x+1)
The absolute value of 8 that is |8| is equal to 8.
We have given that,
|8|
We have to determine the value of |8|.
<h3>What is the absolute value?</h3>
The absolute value or modulus of a real number x denoted |x|, is the non-negative value of x without regard to its sign. Namely, 
if x is a positive number, and 
if x is negative, and 
.
Absolute values only find the true distance of a number from 0. Distance is always positive, so the absolute value of anything is always positive.
|8| = 8
To learn more about the absolute value visit:
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Answer:
Option C is correct, i.e. 2x² +7x -4.
Step-by-step explanation:
Given is (2x-1)(x+4)
Applying FOIL method:-
F- multiply First two, O- multiply Outer two, I- multiply Inner two, L- multiply Last two.
So, (2x-1)(x+4) = 2x*x +2x*4 -1*x -1*4
(2x-1)(x+4) = 2x² +8x -1x -4
(2x-1)(x+4) = 2x² +7x -4
Hence, option C is correct, i.e. (2x-1)(x+4) = 2x² +7x -4.
Answer:
difference of squares
Step-by-step explanation:
a^2 - b^2 = (a-b)(a+b)
This is the definition of the difference of squares
