omg12345678
omg12345678
23-05-2016
Mathematics
contestada
One question is all I need help on.
Respuesta :
caylus
caylus
23-05-2016
Hello,
y=x²+2x
y=3x+20
==>x²+2x=3x+20
==>x²+2x-3x-20=0
==>x²-x-20=0
==>x²-2*1/2*x+1/4-20-1/4=0
==>(x-1/2)²-81/4=0
==>(x-1/2-9/2)(x-1/2+9/2)=0
==>(x-5)(x+4)=0
==>(x=5 and y= 35 ) or (x=-4 and y=-8)
Answer Link
VER TODAS LAS RESPUESTAS ( 24+ )
Otras preguntas
How did textile mills affect the lives of workers?
Estimate then find the product of 758×6
how many chromosomes does a coyote have
What's the answer to 1/7(14-7p)-2=2(1/2p+3)+6
How do you solve 3/4n -18 = 1/4n -4
what is the greatest common factor of 78 and 27 ?
What is halfway between 6500 and 7000
One serving of oatmeal provides 16% of the fiber you need daily. You must get the remaining 21 grams of fiber from other sources. How many grams of fiber should
A farmer set out to travel on a 170 km stretch of lonely prairie highway at an average speed of 105 km/h. he was more than halfway across when his car broke dow
Estimate then find the product of 758×6
