firesoccer4873 firesoccer4873 06-06-2023 Mathematics contestada Find the elementary matrix E, such that E₁A= B where 9 10 1 20 A= 8 -19 -1 and B = 8 -19 20 1 11 10 ? ? E₁ = ? ? ?? ? 9 -/0.5 = 1 Q