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

Factor completely 2x^2 + 9x + 4. A. (2x + 2)(x + 2) B. (2x + 1)(x + 4) C. (2x + 4)(x + 1) D. (2x + 2)(x + 4)
extra points and top BRAINIEST!!!Westin is comparing the triangles below. He uses the similarity statement . Which best describes the accuracy of Westin’s stat
Mario was given some birthday
Maria has an 8 sided die that is numbered from 1 to 8 she rolls the die 96 times about how many times can she expect to roll an 8
A quarter, a nickel, and a dime are all flipped. how many possible outcomes are there?
Help i am in need of help fast pls
What natural element is one of the best preservers of prehistoric time
In an attack known as ____, valid protocol packets exploit poorly configured dns servers to inject false information to corrupt the servers' answers to routine
I need help please someone and don't mind the faded writing I was trying to erase
When you use hallucinogens you are subject to large mood swings?