(a2+2b2-2ab)(a2+2b2+2ab)
Chat with our AI personalities
Usually simple substitutions enable such expressions to be seen as quadratic expressions. The substitutions x = a2 and y = b2 give a4 + b4 - 7a2b2 = x2 - 7xy + y2 which does not have any rational factors. Consequently, the quartic in a and b does not have rational factors.
No, A4 paper is not an example of the golden ratio. The golden ratio is a mathematical ratio of approximately 1.618:1, often found in art, architecture, and nature. A4 paper has dimensions of 210 mm × 297 mm, which do not align with the golden ratio. The aspect ratio of A4 paper is 1:√2, which is based on the ISO 216 standard for paper sizes.
If you mean a2 x a2... the answer is a4
Expand 4ab3 (a2b2-a-1)
Any sheet of paper in the An series - A4 being the most common size for printers and copiers.