X + 3 ) ² = ( X +5 ) ²

Question

X + 3 ) ² = ( X +5 ) ²

Answer 1

X2+6x+9=x2+10x+25
x2-x2+6x-10x=25-9
-4x=16
4x=-16
x=-4

Answer 2

(X + 3 ) ² = ( X +5 ) ²;
х² +6х + 9 = х² + 10х +25;
х² - х² + 6х - 10х = -9 +25;
-4х = 16,
х = 16 : (-4);
х = -4.
Ответ: -4.