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candice1
 3 years 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.
candice1
 3 years 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.

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math456
 3 years ago
Best ResponseYou've already chosen the best response.1so 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..

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

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

math456
 3 years ago
Best ResponseYou've already chosen the best response.1for 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, \[(x+3)^{2}=16+9\]

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

candice1
 3 years ago
Best ResponseYou've already chosen the best response.0are these the answers?

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

candice1
 3 years ago
Best ResponseYou've already chosen the best response.0can you do the rest lol?

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

candice1
 3 years ago
Best ResponseYou've already chosen the best response.0i tried and im stuck. and i have to turn these problems in in 20 mins and its a test.

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