100 POINT AND BRINIEST! DONT ANSWER IF YOU DONT KNOW THAT ANSWER! Describe and correct the error.

Solve: x^3 + 20x = -2x^3 - 7x
3x^3 = 27x = 0
3x( x^2 + 9 ) = 0
3x ( x - 3)(x + 3) = 0
x = { -3, 0, 3}

0

Step-by-step explanation:

3x ( x - 3)(x + 3)  Is wrong the correct answer

=3x3−27x

Because

3x(x−3)(x+3)

=(3x(x−3))(x+3)

=(3x(x−3))(x)+(3x(x−3))(3)

=3x3−9x2+9x2−27x

=3x3−27x

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet