Mathematics
Senior High
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b^2-4acになる理由教えてください!!
?
←ax²+bx+c
= a (x ² + b / x)
+ c
2
b
= a[(x + + + 2 ) ² - ( 2 )²} + 0
a{{x
2a
2a
b
= a (x + 2)² = a ( 2 ) ² + c
2a
b
= a (x + 2)²_6²-4ac
=
4a
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ありがとうございました!!