Simplify
- $\left( 7 x ^ { 2 } - x y - y ^ { 2 } \right) + \left( x ^ { 2 } + 6 x y - 5 y ^ { 2 } \right)$

question 65

Multiple Choice

Simplify.
- $\left( 7 x ^ { 2 } - x y - y ^ { 2 } \right) + \left( x ^ { 2 } + 6 x y - 5 y ^ { 2 } \right)$

• A) \(8 x ^ { 2 } + 5 x y + 4 y ^ { 2 }\)
• B) \(8 x ^ { 2 } - 7 x y + 4 y ^ { 2 }\)
• C) \(8 x ^ { 2 } + 5 x y - 6 y ^ { 2 }\)
• D) \(8 x ^ { 2 } - 7 x y + 6 y ^ { 2 }\)

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Definitions:

Nature And Nurture

A concept in developmental psychology that examines the influence of genetic inheritance (nature) and environmental factors (nurture) on human development.

Deoxyribonucleic Acid

A molecule that carries most of the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses.

Chromosome

A strand-like composition of nucleic acids and protein located in the nucleus of the majority of living cells that bears genetic information in genes.

Molecule

The smallest unit of a chemical substance that can exist independently while retaining the compound's chemical properties.