earevalo106
earevalo106
26-05-2015
Mathematics
contestada
2^(2x)+2^(x+2)−12=0
|
Solve for x
Answer
Respuesta :
crisforp
crisforp
26-05-2015
2^(2x) = (2^x)^2 ;
2^(x+2) = (2^x) × 4 ;
Let be 2^x = y > 0 ;
y^2 + 4y - 12 = 0 ;
a = 1 ;
b = 4 ;
c = - 12 ;
b^2 - 4ac = 16 + 48 = 64 ;
y1 = ( - 4 + 8 ) / 2 = 2 > 0 ( correct ) ;
y2 = ( - 4 - 8 ) / 2 = - 6 > 0 ( false ) ;
Then, 2^x = 2 ;
x = 1.
Answer Link
VER TODAS LAS RESPUESTAS ( 51+ )
Otras preguntas
Complete the statement 7 divide by blank =56
Each of us has a different _____ set that we bring to any situation, and it is important to know both your strengths and your weaknesses.
3 Which substances can be carbon dated? Choose more than one answer. Bone Plastic Hair Leather Rock Ivory Plant remains
Swapnil checks his heart rate to see if he is working hard enough to qualify for a “vigorous-intensity” workout according to the CDC. Which heart rate reading w
A naval submarine was operating 310 feet below the surface of the ocean. To pass above an underwater mountain, or seamount, it rose 165 feet.
WILL GIVE 20 POINTS FAST 4521 is considered a RATIONAL number, what makes this number rational? Explain your answer.
Rewrite the following polynomial in standard form. x+9-7x³ x4
16. Your community decides to install a rectangular swimming pool in a park. There is a 48-foot by 81-foot rectangular area available. There must be at least a
Effect of Temperature on Average Kinetic Energy QUESTION 1 QUESTION 2 Temperature (K) 200 300 400 500 600 Suppose a certain gas is heated to different temperatu
most metais are solid
