Question

Решите уравнение
(x+5)^2+(x-10)^2=2x^2

Answer 1

x^2+25+x^2-100=2x^2
x^2+x^2-2x^2=100-25
x=75

Answer 2

x^2+10x+25+x^2-20x+100=2x^2 получаем 2x^2-10x+125=2x^2 далее 10x=125 x=125/10=12.5

Answer 3

(a+b)^2=a^2+2ab+b^2 (a-b)^2=a^2-2ab+b^2

Answer 4

x^2+10x+25+x^2-20+100=2x^2
10x=120-25
10x=95
x=9,5

Answer 5

x^2+10x+25+x^2-20x+100=2x^2 получаем 2x^2-10x+125=2x^2 далее 10x=125 x=125/10=12.5