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1 year ago

(09.02)

Mathematics

1 answer:

Ivenika [448]1 year ago

4 0

Answer:

4th option

Step-by-step explanation:

x² - 2x - 3 = 0 ( add 3 to both sides )

x² - 2x = 3

using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 1)x + 1 = 3 + 1

(x - 1)² = 4

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Summary

Substitution

Changing or replacing from a term to another terms/expression is called substitution.

Examples:—

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If you have any doubts regarding my answer/explanation, do not hesitate to ask in comment!

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