Find the Product $( 7 y + 9 )$ $( 7 y - 9 )$

question 23

Multiple Choice

Find the product. $( 7 y + 9 )$   $( 7 y - 9 )$

• A) \(49 y ^ { 2 } + 126 y - 81\)
• B) \(49 y ^ { 2 } + 126 y + 81\)
• C) \(49 y ^ { 2 } - 126 y + 81\)
• D) \(49 y ^ { 2 } - 81\)
• E) \(7 y ^ { 2 } + 81\)

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Definitions:

Filtration

A process of separating suspended particles from fluids, gases, or other substances by passing them through a filter.

Osmosis

The diffusion of water across a semipermeable membrane such as a cell membrane.

Left Atrium

One of the four chambers of the heart, receiving oxygenated blood from the lungs and pumping it into the left ventricle.

Bicuspid

Referring to a tooth with two points (cusps), particularly the premolars in humans, or a valve with two flaps in the heart.