Solve the Problem $( 2 x - 9 y ) ^ { 2 }$

question 338

Multiple Choice

Solve the problem.
- $( 2 x - 9 y ) ^ { 2 }$

• A) \(4 x ^ { 2 } - 36 x y + 81 y ^ { 2 }\)
• B) \(4 x ^ { 2 } + 81 y ^ { 2 }\)
• C) \(2 x ^ { 2 } + 81 y ^ { 2 }\)
• D) \(2 x ^ { 2 } - 36 x y + 81 y ^ { 2 }\)

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Definitions:

Silica Tetrahedra

The basic structural unit of silicate minerals, consisting of four oxygen atoms surrounding a single silicon atom.

Silicate Minerals

A group of minerals that contain silicon and oxygen, usually with other metals, forming the largest and most important class of minerals on Earth.

Double Chains

Structures consisting of two parallel chains of atoms or molecules bonded together, often found in silicate minerals.

Silicon Tetrahedron

A structural unit in silicate minerals, consisting of a central silicon atom covalently bonded to four oxygen atoms at the corners of a tetrahedron.