Question

resolve a²-b²-2b-1 into factors​

Answer 1

Step-by-step explanation:

The Bhangar Plains

These are older alluvial plain which represents upland alluvial tract.

These areas are well-drained and make it suitable for cultivation.

This area lies quiet above the flood limits of the neighbouring rivers.

The soil is rich in humus and it gives a high yield due to rich amount of minerals and humus in the soil.

It comprises of calcium carbonate nodules called ‘Kankars’ which are impure in nature.

The Khadar Plains

The new plains formed due to alluvial deposit along the course of the river.

Enriched and formed by fresh deposits of silt every year.

The Khadar land silt comprises of silt, mud, clay, and sand.

The Khadar lands are suitable for the cultivation of sugarcane, rice, wheat, maize and oilseeds.

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Answer 2

Answer:

$a {}^{2} - b {}^{2} - 2b - 1$

$a {}^{2} - (b {}^{2} + 2b + 1)$

$a {}^{2} - ((b {}^{2} + 1) {}^{2} )$

$a {}^{2} - (b {}^{2} + 1) {}^{2}$

$it \: is \: in \: the \: form \: of \: \: \: \: \: \: x {}^{2} - y {}^{2} = (x + y)(x - y)$

$(a {}^{2} - b {}^{2} - 1)(a {}^{2} + b {}^{2} + 1)$

$these \: are \: factors \: of \: the \: given \: equation \:$