Răspunsuri

2014-04-30T21:42:14+03:00
20-(2x-3)²≥5(x+1)²-(3x-4)²
20-4x²+12x-9≥5x²+10x+5-9x²+24x-16
-4x²+12x+11≥-4x²+34x-11
-4x²+4x²+12x-34x+11+11≥0
-22x+22≥0
22(-x+1)≥0
-x+1≥0
-x≥-1
x≤1
x∈(-α, 1]
2014-04-30T23:11:57+03:00