Question

Решите уравнение 5-x)в квадрате=-(4-x)(x+4)

Answer 1

(5-х)²=-(4-х)(х+4)
25-10х+х²=х²-16
-10х=-16-25
-10х=-41
х=-41:(-10)
х=4,1

Answer 2

(5-x)²= -(4-x)(x+4)
25-10x+x²= (x-4)(x+4)
25-10x+x²=x²-4²
25+16=10x+x²-x²
10x=41
x=41/10
x=4.1