Mathematics
Senior High
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(1) x² - 2x - 3=0
My hea
判別式D = (−2)2-4・1 ・ ( テ テ = 16
ト
であるから、異なる2つの実数解をもつ。
(2) 2x²+x+5=0
= - +
WILCOM
判別式D = 12-4.2.5
D< 0 であるから、異なる2つの虚数解をもつ。
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