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I need to solve using matrices. x+2y=9 and x+y=1. I know x=7 and y=8.
 one year ago
 one year ago
I need to solve using matrices. x+2y=9 and x+y=1. I know x=7 and y=8.
 one year ago
 one year ago

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irkizBest ResponseYou've already chosen the best response.0
I am not sure how you learnt to solve this by matrix. Have you heard of the Gaussian elimination?
 one year ago

MertsjBest ResponseYou've already chosen the best response.0
Do you know Cramer's rule?
 one year ago

MertsjBest ResponseYou've already chosen the best response.0
Write the denominator determinant first. It is the coefficients of the x's and y's. For the x numerator, replace the x coefficients with the constants. For the y numerator, replace the y coefficients with the constants. Then evaluate the determinants.
 one year ago

berrypickingBest ResponseYou've already chosen the best response.0
1 2 1 1 is that the denom. deter?
 one year ago

MertsjBest ResponseYou've already chosen the best response.0
Can you see what I posted?
 one year ago

berrypickingBest ResponseYou've already chosen the best response.0
i got it ended up with {1 2 {9 1 1} 1}==={7,8}
 one year ago
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