Question

Решите уравнение : (x-4)^2+(x+9)^2=2x^2

Answer 1

x²-8x+16+x²+18x+81=2x²
10x=-97
x=-9.7

Answer 2

x^2 - 8x + 16 + x^2 + 18x + 81 - 2x^2 = 0 
2x^2 - 2x^2 + 10x + 97 = 0 
10x = - 97
x = - 97/10 = - 9,7