zez
zez
07-06-2015
Mathematics
contestada
what are the zeros of the function f(x)=(x+2)^2-25
Respuesta :
Panoyin
Panoyin
09-06-2015
f(x) = (x + 2)² - 25
f(x) = (x + 2)(x + 2) - 25
f(x) = x(x + 2) + 2(x + 2) - 25
f(x) = x(x) + x(2) + 2(x) + 2(2) - 25
f(x) = x² + 2x + 2x + 4 - 25
f(x) = x² + 4x + 4 - 25
f(x) = x² + 4x - 21
0 = x² + 4x - 21
x =
-(4) ± √((4)² - 4(1)(-21))
2(1)
x =
-4 ± √(16 + 84)
2
x =
-4 ± √(100)
2
x =
-4 ± 10
2
x = -2 ± 5
x = -2 + 5 U x = -2 - 5
x = 3 U x = -7
The solution set is {3, -7}.
Answer Link
VER TODAS LAS RESPUESTAS ( 94+ )
Otras preguntas
PLSSSSS HELP!!!! Fast!!! You pick a card at random. Without putting the first card back, you pick a second card at random. 3 4 5 What is the probability of pi
When a seismic wave hits an interface and some of the energy is bent as it crosses that boundary, the wave has been _______.
Factor 125x9 + 64. (5x3 – 4)(25x6 + 20x3 + 16) (5x3 – 4)(25x3 + 20x3 + 16) (5x3 + 4)(25x6 – 20x3 + 16) (5x3 + 4)(25x3 – 20x3 + 16)
Current research on dopamine's role in schizophrenia emphasizes which of the following? 1) Chemical precursors to dopamine 2) The dopamine/serotonin balance 3)
What type of contract is mostly used within Design and Construct project delivery system? 1) Cost Reimbursable 2) Time and Material 3) Fixed Price
In a paragraph response (five sentences), what is your reaction to the treatment of natives in Congo? Why would the Belgians and the King commit these actions?
what's the median of 47,38,72,56,40,64,30,,80,66,51,33,74,70,69
Random drug testing of employees is provided for in most state constitutions.forbidden by a number of states or limited to safety-sensitive situations.a. trueb.
use a Pythagorean triple to find the value of x from the triangle 28 , 96 and x
Lipid metabolism is under the molecular control of a group of compounds called nuclear receptors. Which of the following type of nuclear receptors is involved i
