give system of equation 2x-y+8z=13 3x+4y+5z=18 5x-2y+7z=20 by matrix inversion
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4
Step-by-step explanation:
3x+4y+5z=18,2x−y+8z=13,5x−2y+7z=20
D=∣∣∣∣∣∣∣∣3254−1−2587∣∣∣∣∣∣∣∣=3(−7+16)−4(14−40)+5(−4+5)
=3(9)−4(−26)+5(1)=27+104+5=136
D1=∣∣∣∣∣∣∣∣1813204−1−2587∣∣∣∣∣∣∣∣=18(−7+16)−4(91−160)+5(−26+20)
=18(9)−4(−69)+5(−6)=162+
Answered by
1
Step-by-step explanation:
Step-by-step explanation:
3x+4y+5z=18,2x−y+8z=13,5x−2y+7z=20
D=∣∣∣∣∣∣∣∣3254−1−2587∣∣∣∣∣∣∣∣=3(−7+16)−4(14−40)+5(−4+5)
=3(9)−4(−26)+5(1)=27+104+5=136
D1=∣∣∣∣∣∣∣∣1813204−1−2587∣∣∣∣∣∣∣∣=18(−7+16)−4(91−160)+5(−26+20)
=18(9)−4(−69)+5(−6)=162+
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