l6illfemyukiynannag
l6illfemyukiynannag l6illfemyukiynannag
  • 20-05-2016
  • Mathematics
contestada

Which equations are true for x = –2 and x = 2? Check all that apply.

A.x2 – 4 = 0
B.x2 = –4
C.3x2 + 12 = 0
D.4x2 = 16
E.2(x – 2)2 = 0

Respuesta :

Mashuly
Mashuly Mashuly
  • 20-05-2016
А. х²-4=0; х²=4; х=±2, true. B. x²=-4; there is no solution. C. 3x²+12=0; 3x²=-12; x²=-4; there is no solution. D. 4x²=16; x²=4; x=±2, true. E. 2(x-2)²=0; 2(x²-4x+4)=0; 2x²-8x+8=0; x²-4x+4=0; x1=2; x2=2. False. The answer: A, D.
Answer Link

Otras preguntas

Lee starts entering data into the table. He types in the mass of Mercury. Next, he wants to type in the diameter of Mercury. What should he do to get to the app
Emery needs to select a single word within a text box on a PowerPoint slide. Which action should he perform to achieve this? *it's b
what is the function of alcohal in alcohal thermometre. PLS HELP​
which the driver had not dipped grammatical expression​
What is the end behavior of a sixth degree polynomial function whose leading coefficient is negative?
50 POINTS Colin has just been elected his citys new mayor. What skill would be beneficial to Colin in this position? A. Colin is artistic and loves to create th
One number is 3 times another. If the difference between the numbers is 14, what is the larger number?
Can u answer this u are just making a equation and answering it?
Read the following summary of a play: Kara is a young photographer who has been given her first high-profile assignment. Alex is a professional athlete who has
missing angles of triangle