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jit4wonsolve each equation by completing the square. round to the nearest hundredth if necessary.
3. x^2+6x =16
4. x^210x =11
5. x^29x =0
6. x^2+16x =15
7. 3x^2+18x81=0
use the quadratic formula to solve each equation. round to the nearest hundredth if necessary.
8. 4x^2+3x8=0
9.2x^27x+3=0
10. x^22x+3=0
11. 2x^2+4x7=0
I DONT GET THIS STUFF.
 one year ago
 one year ago
jit4wonsolve each equation by completing the square. round to the nearest hundredth if necessary. 3. x^2+6x =16 4. x^210x =11 5. x^29x =0 6. x^2+16x =15 7. 3x^2+18x81=0 use the quadratic formula to solve each equation. round to the nearest hundredth if necessary. 8. 4x^2+3x8=0 9.2x^27x+3=0 10. x^22x+3=0 11. 2x^2+4x7=0 I DONT GET THIS STUFF.
 one year ago
 one year ago

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math456Best ResponseYou've already chosen the best response.1
so for quadratic stuff.. Use this formula..\[b \pm \sqrt{b ^{2}4ac}/2a\] like for question 8: a=4; b=3; c=8 < plug these number in the equation and solve..
 one year ago

candice1Best ResponseYou've already chosen the best response.0
i knew i was missing a formula lol. thanks.
 one year ago

math456Best ResponseYou've already chosen the best response.1
lol kk welcome.. for completing the sq..http://www.purplemath.com/modules/sqrquad.htm
 one year ago

math456Best ResponseYou've already chosen the best response.1
for ur question 3. \[x ^{2}+6x=16\] \[x ^{2}+6x+9\] is a complete sq. so u take 3 inside the brackets and take +9 to the other side.. like, \[(x+3)^{2}=16+9\]
 one year ago

math456Best ResponseYou've already chosen the best response.1
\[(x+3)^{2}=25\] < take the sq. root on both sides.. \[\sqrt{(x+3)^{2}}=\sqrt{5^{2}}\]
 one year ago

candice1Best ResponseYou've already chosen the best response.0
are these the answers?
 one year ago

math456Best ResponseYou've already chosen the best response.1
x=53 ; x=53 x=2 ; x=8 No this is answer to question 3
 one year ago

candice1Best ResponseYou've already chosen the best response.0
can you do the rest lol?
 one year ago

math456Best ResponseYou've already chosen the best response.1
try doing it, if you get stuck i will help u..
 one year ago

candice1Best ResponseYou've already chosen the best response.0
i tried and im stuck. and i have to turn these problems in in 20 mins and its a test.
 one year ago

beenthebestBest ResponseYou've already chosen the best response.0
X^26X=20 its saying round to the nearest hundredth can someone help me please
 9 months ago
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