Question

Escreva
as seguintes equações no forma reduzida.depois resolva-as,em caderno
B.(m+5).(m-4)=m+16

Answer 1

$(m+5).(m-4)=m+16\to \\\\\\ m^2-4m+5m-20=m+16\to\\\\ m^2-4m+5m-20-m-16=0\to \\\\ m^2-5m+5m-36=0\to \\\\ m^2-36=0\to \\\\ m^2=36\to\\\\ m=+- \sqrt{36} \to \\\\m=+-6\\\\\\ S=(-6;+6)$


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