What are the exact solutions of x2 − 5x − 7 = 0, where x equals negative b plus or minus the square root of b squared minus 4 times a times c all over 2 times a

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Step-by-step explanation:

Given

Required

Solve for x using:

First, we need to identify a, b and c

The general form of a quadratic equation is:

So, by comparison with

Substitute these values of a, b and c in

Split the expression to two

 or  

To solve further in decimal form, we have

 or  

 or  

or

b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.