Math, asked by ravichandran9896, 9 months ago

find the value of x squared minus 1 by 5 8 x is equal to -1​

Answers

Answered by amminenidillibabu
0

Answer:

Explanation:

The area of a rectangle can be determined by the following formula.

A

=

l

w

l

stands for length or the longer side.

w

stands for width or the shorter side.

Now, we can plug the values we are given into the equation.

A

=

(

x

2

)

(

x

+

8

)

The easiest way to multiply is to follow the acronym FOIL , which stands for First Outside Inside Last, and dictates the order in which you multiply these terms.

A

=

x

2

+

8

x

2

x

16

=

x

2

+

6

x

16

Now, we can plug in the given value for the area.

39

=

x

2

+

6

x

16

Next, we simplify by moving all terms to one side and factor the equation.

0

=

x

2

+

6

x

55

Finally, we factor the equation. This means we reverse-FOIL, trying to determine the two things that we multiplied together.

0

=

(

x

5

)

(

x

+

11

)

If the equation ultimately equals zero, either

(

x

5

)

or

(

x

+

11

)

or both equal zero. Therefore, we set each equal to zero to find the value of

x

.

x

5

=

0

x

=

5

x

+

11

=

0

x

=

11

Since

x

is a length, we know it cannot be negative. Thus, we can conclude that it equals 5.

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