E^2 = 14^2
e = +14 and e = -14
..................................
The given plane has normal vector

Scaling <em>n</em> by a real number <em>t</em> gives a set of vectors that span an entire line through the origin. Translating this line by adding the vector <2, 1, 1> makes it so that this line passes through the point (2, 1, 1). So this line has equation

This line passes through (2, 1, 1) when <em>t</em> = 0, and the line intersects with the plane when

which corresponds the point (3, -1, 1) (simply plug <em>t</em> = 1 into the coordinates of
).
So the distance between the plane and the point is the distance between the points (2, 1, 1) and (3, -1, 1):

The number that is its own opposite is zero. Zero is both a positive and a negative number at the same time.
To turn a fraction into a decimal, you have to divide the numerator by the denominator.
So, divide 7 by 16 and you get 0.4375
The decimal is 0.4375.
Hope it helps
(4x+9)(3x+5)
=12x^2+20x+27x+45
=12x^2+47x+45