Complete the square for 2x2 - 4x = 14.

Mathematics

1 answer:

koban [17]3 years ago

5 0

Answer:

Step-by-step explanation:

Given

2x² - 4x = 14 ( divide through by 2 )

x² - 2x = 7

To complete the square

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

x² + 2(- 1)x + 1 = 7 + 1

(x - 1)² = 8 → B

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Jane thinks of a number. call it X. She doubles her number, then adds 5 to double the number. What is the number?

Anni [7]

Answer:

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Step-by-step explanation:

We start with the unknown number, X.

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⇒ <u>2X</u>

<u />

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3 years ago

A country's population in 1992 was 72 million. In 1998 it was 76 million. Estimate the population in 2012 using the exponential

stepan [7]

We assume the annual percentage increase is the same. We will work out the constant k using the formula

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P = 76
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We can now work out the number of population by the end of 2012 using the formula

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t = 10 years (1992 to 2012)

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3 years ago

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