3x^2+10x+3=0
2x^2+10x-2+x^2=3x^2+10x-2
Не равносильны
x-9<0
3x-2-4x+8+3>0
-x+9>0
Равносильны
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Verified answer
3x^2+10x+3=0
2x^2+10x-2+x^2=3x^2+10x-2
Не равносильны
x-9<0
3x-2-4x+8+3>0
-x+9>0
x-9<0
Равносильны