Question

Решите уравнение (x+15)^2=(x-6)^2

Answer 1

х²+30х+225=х²-12х+36
30х+12х=36-225
42х=-189
х=-189:42
х=-4,5

Answer 2

х^2+20х+225=х^2-12х+36
х^2+20х+225-х^2+12х-36=0
32х-189=0
32х=189
Х=5,9