выделить полный квадрат
[tex]x^2+20x-14[/tex]
[tex]2x^2-12x+3[/tex]
1) x^2+20x-14 = (x+10)^2 - 114
2) 2x^2-12x+3 = 2(x-3)^2 - 15
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Answers & Comments
1) x^2+20x-14 = (x+10)^2 - 114
2) 2x^2-12x+3 = 2(x-3)^2 - 15