1) 5x^2-9x+4>0
D=81-4*4*5=81-80=1
√D=√1=1
x1=9+1/10=1
x2=9-1/10=4/5
2)2x≥-3
x≥-1.5
x>1
x>4/5
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Answers & Comments
1) 5x^2-9x+4>0
D=81-4*4*5=81-80=1
√D=√1=1
x1=9+1/10=1
x2=9-1/10=4/5
2)2x≥-3
x≥-1.5
x>1
x>4/5
x≥-1.5