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candice1
Group Title
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.
 2 years ago
 2 years ago
candice1 Group Title
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.
 2 years ago
 2 years ago

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math456 Group TitleBest 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..
 2 years ago

candice1 Group TitleBest ResponseYou've already chosen the best response.0
i knew i was missing a formula lol. thanks.
 2 years ago

math456 Group TitleBest ResponseYou've already chosen the best response.1
lol kk welcome.. for completing the sq..http://www.purplemath.com/modules/sqrquad.htm
 2 years ago

math456 Group TitleBest 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, \[(x+3)^{2}=16+9\]
 2 years ago

math456 Group TitleBest ResponseYou've already chosen the best response.1
\[(x+3)^{2}=25\] < take the sq. root on both sides.. \[\sqrt{(x+3)^{2}}=\sqrt{5^{2}}\]
 2 years ago

math456 Group TitleBest ResponseYou've already chosen the best response.1
\[x+3=\pm5\]
 2 years ago

candice1 Group TitleBest ResponseYou've already chosen the best response.0
are these the answers?
 2 years ago

math456 Group TitleBest ResponseYou've already chosen the best response.1
x=53 ; x=53 x=2 ; x=8 No this is answer to question 3
 2 years ago

candice1 Group TitleBest ResponseYou've already chosen the best response.0
oh okay thanks.
 2 years ago

candice1 Group TitleBest ResponseYou've already chosen the best response.0
can you do the rest lol?
 2 years ago

math456 Group TitleBest ResponseYou've already chosen the best response.1
try doing it, if you get stuck i will help u..
 2 years ago

candice1 Group TitleBest 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.
 2 years ago

beenthebest Group TitleBest ResponseYou've already chosen the best response.0
X^26X=20 its saying round to the nearest hundredth can someone help me please
 one year ago
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