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Solve the following system of equations.
2a – 3b + c = 10
2a – 2b – 2c = 2
a + 3b + 2c = –1
 one year ago
 one year ago
Solve the following system of equations. 2a – 3b + c = 10 2a – 2b – 2c = 2 a + 3b + 2c = –1
 one year ago
 one year ago

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ghaziBest ResponseYou've already chosen the best response.0
use determinant to solve above equation
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
there are different methods that all come to the same results; since you have not defined a method, the determinant is suitable
 one year ago

daren13354Best ResponseYou've already chosen the best response.0
the determinant is kidna useless you can tell if it's not factorable once you have the equation narrowed to 2 variables.
 one year ago

daren13354Best ResponseYou've already chosen the best response.0
just use substitution :D!
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
ugh, substitution on these takes forever!!
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
you scale the eqauations so that you can combine them and eliminate one of more of the variables
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
R1, 2a – 3b + c = 10 R2, 2a – 2b – 2c = 2 R3, a + 3b + 2c = –1 R3(2), R2(1) R1, 2a – 3b + c = 10 R2, 2a + 2b + 2c =2 R3, 2a 6b 4c = 2 R1+R2, and R1+R3 R1, 2a – 3b + c = 10 R2, 0  b + 3c = 8 R3, 0  9b  3c = 12 R2(9) R1, 2a – 3b + c = 10 R2, 0 +9b 27c = 72 R3, 0  9b  3c = 12 R2 + R3 R1, 2a – 3b + c = 10 R2, 0 +9b 27c = 72 R3, 0 + 0  30c =60
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
R1, 2a – 3b + (2) = 10 R2, 0 +9b 27(2) = 72 R1, 2a – 3b = 102 R2, 0 +9b = 72+54 b = 18/9 = 2 R1, 2a – 3(2) = 8 R1, 2a + 6 = 8 a = (86)/2 = 1
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
2a – 3b + c = 10 1 2 2  2 + 6 + 2 = 10 2a – 2b – 2c = 2 1 2 2  2 + 4  4 = 2 a + 3b + 2c = –1 1 2 2  1 6 + 4 = 1
 one year ago

satellite73Best ResponseYou've already chosen the best response.0
wow that is a lot of work i do not like these so much do you?
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
it takes longer to show the work than it does to actually get the answer :)
 one year ago

amistre64Best ResponseYou've already chosen the best response.1
i hope it was helpful :)
 one year ago
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