How to solve quadratic equations with the coefficient not equal to 1?

1 answer:

5 0

Which coefficient? There are multiple, as the general formula of a quadratic equation is $ax^2+bx+c$ .
There are a few ways, and if you can factorise by inspection that works, however the most effective way of solving equations that aren't obvious is to plug it into the quadratic formula:

$\boxed{x=-b +- \frac{ \sqrt{b^2-4ac} }{2a} }$

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geniusboy [140]

Answer:

4200

Step-by-step explanation:

4280=(?)+80

So the answer is 4200

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A newspaper used a chart resembling the one to the right to illustrate the rising amounts that a video rental company spends to

Dmitry [639]

This question is incomplete- no bar chart was included.

The complete question was gotten from google.

Open the attachment below to see the bar chart'

Answer:

A newspaper used a chart resembling the one to the right to illustrate the rising amounts that a video rental company spends to provide streaming content online. Is this the bar chart of a categorical variable, or is it a time plot that uses bars to show the data? It is a time plot that uses bars to show the data; because it graphs a series of data recorded over time; presenting the values in sequential order.

Step-by-step explanation:

The chart used in the newspaper to illustrate the rising amounts that a video rental company spends to provide streaming content online is a time plot that uses bars to show the data; because it graphs a series of data recorded over time; presenting the values in sequential order.