Simplify the Expression $7 \left\{ 9 y ^ { 2 } + 4 \left[ 5 y ^ { 2 } - \left( y + z ^ { 2 } \right) \right] \right\}$

question 44

Multiple Choice

Simplify the expression. If the expression cannot be simplified, so state.
- $7 \left\{ 9 y ^ { 2 } + 4 \left[ 5 y ^ { 2 } - \left( y + z ^ { 2 } \right) \right] \right\}$

• A) \(175 y ^ { 2 } - 28 y\)
• B) \(83 y ^ { 2 } - 4 y - 4 z ^ { 2 }\)
• C) \(203 y ^ { 2 } - 7 y + 7 z ^ { 2 }\)
• D) \(203 y ^ { 2 } - 28 y - 28 z ^ { 2 }\)

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Definitions:

Convenience Sample

A non-probability sampling method where the sample is taken from a group of people easy to contact or to reach.

Longitudinal Sample

A research sample that is observed over a long period of time to track changes and developments in the subjects.

Operational Definition

A clear, precise description of a variable in terms of the procedures or operations by which it can be observed and measured.

Grief

The deep sorrow experienced due to loss, especially of a loved one, encompassing various emotional stages and processes.