1. Solve each equation by graphing the related function. If the equation has no real-number solution, write no solution. x^2-9=0 A. x= ±3 B. x= ±9 C. x= 0 D. no solution
Mathematics · High School · Wed Jan 13 2021
Answered on
Given the equation:
x^2 - 9 = 0
Solve the equation.
Solution:
In order to solve the equation we simply transpose -9 first to the other side of the equation hence it must be taken to note that in transposing a number, the sign changes.
x^2 - 9 = 0
x^2 = 9
Now we need to take the square root of both sides in order to determine the value of x. This can be done by either representing with a square root sign or raising the value to ½.
(x^2)^½ = (9)^½
x = ± 3
Final answer:
x = ± 3