Question

Poderiam me ajudar a calcular em fórmula de bhaskara ? x+9=(11-x)²

Answer 1

x+9=121+x^2
x+9-121+22x-x^2=0
23x-112-x^=0
-x^2+23x-112=0
x^2-23x+112=0
x=-(-23)+-√(-23)^2-4.1.112/2.1 (sobre 2.1)
x=23+-√529-448/2
x=23+-√81/2
x=23+-9/2
x1=32/2=16
x2=14/2=7