0
2x + 6 = 2(x + 3) so 2x + 6 = 0 implies x = -3
Now, substitute x = -3 in 8x3 + 20x2 + 36
which is -8*27 + 20*9 + 36
= -216 + 180 + 36 = 0
So -3 is a root of 8x3 + 20x2 + 36
ie, by the remainder theorem, (x + 3) is a factor.
Also, each of the coeffivcients in the expression is even, so 2 is also a factor.
So 2*(x + 3) or (2x + 6) is a factor.
What else can I help you with?
What is 2x4 plus 8x3 plus 18x?
(2x4) + (8x3) + 18x 8 + 24 + 18x 32 + 18x
2x3 plus 8x3-5x2 plus 8x2?
10x3 + 3x2
What is x5 plus 10x4 plus 8x3 plus 4x plus 2?
is a quintic expression in x (NOT an equation).
Simplify -8x3 plus 5x2 - 4x - 3 plus x2 plus 9x - 8?
i thinking this answer should be -20
What is the cube root of 8x3 plus 1?
Windows calculator states it as... 2.9240177382128660655067873601379
When excel follows the order of operation 8x3 plus 2 equals what?
26
What do 8x3?
8x3=24
What is the answer to 40-8x3?
40-8x3 is equal to 16.
What is 4x4-8x3 plus 31x2-72x-45 equals 0?
It is a quartic equation in the variable x.
What is 9x4-8x3?
9x4 is 36 and 8x3 is 24
Factor 8x cubed plus 4x squared plus 6x plus 3?
This is how I did it:8x3+4x2+6x+3[8x3+4x2]+[6x+3][(4x2)(2x+1)]+[(3)(2x+1)]....as you can see, this is in the general form of ab+cb, which factored is b(a+c), so:(2x+1)(4x2+3)
How do you multiply parentheses 4x plus 1 parentheses 2x to the second power plus x plus 1 parentheses?
To multiply (4x + 1) by (2x2 + 1), perform the cross product, or multiply each combination of terms and then reduce... 8x3 + 2x2 + 4x + 1 ...In this case, reduction is not needed.
