Polynomial equations have the form P (X) = 0, where P is a polynomial. Linear equations have the form a (x) + b = 0, where a is a linear function and b is a vector. To solve them, one uses algorithmic or geometric techniques, coming from linear algebra or mathematical analysis. Changing the domain of a function can change the problem considerably.
When piecing the backing of a quilt, avoid using a center seam. When a quilt is folded in half, the extra bulk of the center seam along the fold line stresses the quilt, causing the quilt top and batting to break down. Instead, cut one of the lengths of backing fabric into two long, narrow pieces. Stitch a narrow piece to each side of the full-width piece. The quilt should be loaded into the quilting frame with the seams running the same direction as the rail does (also called the belly bar) .
Planning the Quilt Back. You can piece leftover fabrics from the quilt top or from an entirely different quilt project. This is especially charming when you are making a reproduction or historical quilt. Like batting, the backing needs to be larger than the quilt top. This allows for the fabric that is taken up during the quilting and for stabilization when using a quilting frame. Always add 6 to both the length and width measurements so you have an extra 3 all around.