(x-3)2+(3-x)(x+3)=(x+2)2-x2

Question

(x-3)2+(3-x)(x+3)=(x+2)2-x2

Answer 1

(x-3)²+(3-x)*(x+3)=(x+2)²-x²
x²-6x+9+9-x²=x²+4x+4-x²
-6x-4x=4-9-9
-10x=-14|:(-10)
x=1,4
Ответ:1,4

Comments

спасиб