nycmathguy Joined Jun 27, 2021 Messages 5,386 Reaction score 422 Jun 24, 2022 #3 MathLover1 said: correct Click to expand... This is too easy for me to get wrong.
MathLover1 Joined Jun 27, 2021 Messages 2,989 Reaction score 2,884 Jun 24, 2022 #4 using your result: determinants must be equal 80(1/2)-(-4*25)=25*5.2-x*0 140=130 -> false
nycmathguy Joined Jun 27, 2021 Messages 5,386 Reaction score 422 Jun 24, 2022 #5 MathLover1 said: using your result: View attachment 3695 determinants must be equal 80(1/2)-(-4*25)=25*5.2-x*0 140=130 -> false Click to expand... Very good. There are two more matrix equations here unanswered. Also, check out my threads in the Off-topic Chat forum. I posted some basic trigonometric equations in the Geometry & Trigonometry forum.
MathLover1 said: using your result: View attachment 3695 determinants must be equal 80(1/2)-(-4*25)=25*5.2-x*0 140=130 -> false Click to expand... Very good. There are two more matrix equations here unanswered. Also, check out my threads in the Off-topic Chat forum. I posted some basic trigonometric equations in the Geometry & Trigonometry forum.