SOLUTION: PLEASE HELP ME IF ANYONE CAN FOR WHICH OF THE FOLLOWING EQUATIONS IS X=-2 a ROOT? (1)2/X-X=0 (2)X^2+4=0 (3)X^7+4X+4=0

Question 925683: PLEASE HELP ME IF ANYONE CAN
FOR WHICH OF THE FOLLOWING EQUATIONS IS X=-2 a ROOT?
(1)2/X-X=0
(2)X^2+4=0
(3)X^7+4X+4=0
Answer by CharlesG2(834) (Show Source): You can put this solution on YOUR website!
PLEASE HELP ME IF ANYONE CAN
FOR WHICH OF THE FOLLOWING EQUATIONS IS X=-2 a ROOT?
(1)2/X-X=0
(2)X^2+4=0
(3)X^7+4X+4=0
did all 3 below
(1) 2/x - x = 0
(2 - x^2)/x = 0 (using common denominator x)
2 - x^2 = 0
-x^2 = -2
x^2 = 2
((( x = +- sqrt(2) )))
(2) x^2 + 4 = 0
x^2 = -4
x^2 = -1 * 4
x = i * +-2
x = +- 2i (i is the imaginary root of -1)
(3) x^7 + 4x + 4 = 0
well I certainly not gonna do this one
I think you mean x^2 + 4x + 4 = 0 and did a typing error
x^2 + 4x + 4 = 0
(x + 2)(x + 2) = 0 (use FOIL (first outer inner last) and you will see it equals previous line)
x = -2

RELATED QUESTIONS
Which of the following equations is quadratic? x(x2+ 1) = 0 5(4x+ 2) = 3 (x+ 3)(x+ 4)... (answered by MathLover1)

Please can someone help me solve the following. I would really appreciate some help.... (answered by stanbon)

Can you help me solve this question? Determine the number of solutions and classify the... (answered by Alan3354)

Can someone help me solve this question? Determine the number of solutions and... (answered by feliz1965)

PLEASE IF ANYONE CAN HELP SO PLEASE ATTEMPT IT IF X-Y=0,THEN XY MUST EQUAL WHICH OF THE (answered by TimothyLamb)

PLEASE HELP ME PLEASE...... IF A(X-Y)=0,THEN WHICH OF THE FOLLOWING STATEMENTS... (answered by MathLover1)

Which of the following equations has only one solution? x^2 + 4x + 4 = 0 x^2 + x = 0... (answered by TimothyLamb)

Please im asking for some help with the following promblems. You guys have really helped... (answered by Nate)

Hi to all, please help me solve these following equations with solution: How many... (answered by ewatrrr)