4x²+12x+9=81解方程
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解决以下公式:
(2)4个2 12 x 9 = 81
(2×3)^ 2 = 81
2×3 = 9大地
X1 = 6×2 = -12
(4)2×2 +3×= 3
X ^ 2 +3×/ 2 = 3/2
(倍3/4)^ 2 = 3 / 2 +9 / 16 =第33/16
x +3开始/ 4 =土壤√第33/4
X1 =(√33-3)/ 4×2 = - .(√33 +3)/ 4
(6)×(2X-5)= 4X-10
2X ^ 2-5X = 4X-10
2X ^ 2-9X +10 = 0
(X-2),(X-5)= 0
的x 2 = 0,X1 = 2
X-5 = 0,X2 = 5
(8)1 - 8X +16×2 = 2-8X
16X ^ 2 = 1 X ^ 2 = 1/16
X =土1/4
X1 = 1/4×2 = -1 / 4.
(2)4个2 12 x 9 = 81
(2×3)^ 2 = 81
2×3 = 9大地
X1 = 6×2 = -12
(4)2×2 +3×= 3
X ^ 2 +3×/ 2 = 3/2
(倍3/4)^ 2 = 3 / 2 +9 / 16 =第33/16
x +3开始/ 4 =土壤√第33/4
X1 =(√33-3)/ 4×2 = - .(√33 +3)/ 4
(6)×(2X-5)= 4X-10
2X ^ 2-5X = 4X-10
2X ^ 2-9X +10 = 0
(X-2),(X-5)= 0
的x 2 = 0,X1 = 2
X-5 = 0,X2 = 5
(8)1 - 8X +16×2 = 2-8X
16X ^ 2 = 1 X ^ 2 = 1/16
X =土1/4
X1 = 1/4×2 = -1 / 4.
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