Question

estou com duvida no exercicio 26.c)

Answer 1

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Ola Calebe

x² + y² = 13²

x + y = 15

y = 15 - x
y² = 225 - 30x + x²

x² + 225 - 30x + x² = 169

2x² - 30x + 56 = 0

x² - 15x + 28 = 0

d² = 225 - 112 = 113
d = √113

x1 = (15 + √113)/2 , y1 =  (15 - √113)/2 
x2 = (15 - √113)/2 , y2 = (15 + √113)/2 

pronto