22-04-2014
Mathematics

Answered

What are the solutions to the equation x2 + 6 = 87? A. –9 and 9 B. –10 and 10 C. –6 and 6 D. The equation has no solutions.

Answer :

23-04-2014

[tex] x^2 + 6 = 87 \ \ | -87\\ \\x^2 + 6 -87 = 0 \\ \\ x^2 -81 = 0 \\ \\(x+9)(x-9)=0 \\ \\ x+9 =0 \ \ \vee \ \ x-9 =0 \\ \\ x= -9 \ \ \vee \ \ x= 9 \\ \\\\Answer : \ A.) \ \ -9 \ \ and \ \ 9 [/tex]

[tex]a^2 - b^ 2 =(a-b)(a+b)[/tex]

Answer Link

Other Questions

In order to influence the debate over slavery Harriet Beecher Stowe did what

whats the answer to v938

8330000000 written in scientific notation

why did thomas edison invent the movie camera

classify the following reaction P4 O10 6H 2O 4H3PO4

Which two Asian nations are facing the GREATEST problems with air and water pollution A India and Japan B Japan and China C India and China D Taiwan and India

why do fractions need to have a common denominator before you add or subtract them

what effect did mining have on the west

If sin α1213 and cos α513 then tan α

Find the value of the variable I understand the two angles are corresponding with one another but how would I find the value of the variable with whats given