Rozwiiąż równanie : (5x-10)(x-6)=6
(5x-10)(x-6)=6
5x^2-30x-10x+60-6=0
5x^2-40x+54=0
∆=1600-1080=520 √∆=2√130
x=40-2√130/10=2(20-√130)/10=20-√130/5 lub x=20+√130/5
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(5x-10)(x-6)=6
5x^2-30x-10x+60-6=0
5x^2-40x+54=0
∆=1600-1080=520 √∆=2√130
x=40-2√130/10=2(20-√130)/10=20-√130/5 lub x=20+√130/5