- Simplify. (-6 - 5i)(1 + 3i)?

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I need help in math
anyone can help me pleasse? Adjacent =10
Opposite =1,000
Whats the tan? Qual a massa de NaOH necessária para precipitar todos íons Fe2+ de 25,0 mL de uma solução 0,50 mol/L de Fe(NO)2? When I partition a line segment in geometry, how do i find the "k"? Find the equation of directrices of ellipse 9x²+4y²=36. Isn't it y=+/-9/2?