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 ( 17+ )
Otras preguntas
Sodium hydroxide solution reacts with copper (II) nitrate solution to produce a a. White precipitate b. Colourless precipitate c. Blue precipitate d. Brown prec
Can someone show me how to answer this type of question? (100 points)
Complete the long division problem on your own sheet of paper. Then, fill in the digits.
tdrddcyvffttgbfrdr5gthbvgfhbvgb
and Their Relationships (continued) Create a tolerance graph similar to the Tolerance of Steelhead Trout figure in your book. Title your graph Tolerance of Plan
Before reform Candidates running for office were usually chosen by a small group of party leaders. Voters had no say in who the candidates would be. What happen
If x ÷(-3) < 0 which of the following statements are true x > 0 x < 0 or there isnt enough information to determine the sign of x
please help it's my last one
f(x)=2x2+x+1 what is the value of f (-3)
??????????????????????????????
