Mathematics
Junior High
Solved
解き方が分かりません。
次の二次方程式を解きなさい。
(11
2
x²-3=2x+1
(7)
(x+4) (x-4)=6x
(6) x (x+4) = 7
x²+4x-7=0
x²+4x+2² = 7+2²
(k+ 2/25/17
X=-2=NTI
2
(8) 5 x² +8x=4(x + 1) ²
2x (x-1)=2x
(10)
(T) 4 x (x - 3) = 8 x − 25
-
-
○x(3x+2)
3 x² + 2 x + 1 = ( x − 3 ) ( x − 1 ) (12) x (3 x + 2) = x² − 4 x
-
(5) x=1±√√5
(6) x = -2 ± √11
(7)
x = -28
(8)
x = ± 2
(9) x=0, 2
=0、2
(10)
x =
(11) x
52
-3 ± √13
(12) x = 0, −3
2
Answers
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