Respostas

2014-04-24T21:31:49-03:00
10(X²-2)=5(X²+1)+4X² 
10x² -20 = 5x² +5 +4x² 
10x²-5x² -4x² = +5 +20 
x² =  25 
√x² = √25 
x +-  5 
1 5 1
2014-04-24T21:33:56-03:00
10(X²-2)=5(X²+1)+4X²
10x
²-20=5x²+5+4x²
10x²-5x²-4x²=20+5
x²=25
x=√25
x=5