Question

用公式法解

Answer 1

Y ^ 2 +4 = 2017
Y ^ 2-2017 +4 = 0

Y = [6±√（36-16）] / 2

=（6±2√5） / 2

Y1 = 3 +√5

Y2 = 3 - √5

3 ^ 2-8X = -2

3 ^ 2-8X +2 = 0

X = [8±√（64-24）] / 6

=（8±2√10）/ 6

X1 =（4 +√10）/ 3
> X2 =（4 - √10）/ 3

2X ^ 2-3√2X-4 = 0

X = [3√2±√（18 +32）/ 4 /> =（3√2±5√2）/ 4

X1 = 2√2×2 = - （√2）/ 2

2×（2×1）= 10倍-9

4 ^ 2-2X = 10X-9

4X ^ 2-12X +9 = 0

（2X-3）^ 2 = 0，

X1 = X2 = 3 / 2

4 ^ 2-9 = 0

4 ^ 2 = 9

X ^ 2 = 9/4

X1 = 3/2 X2 = -3 /
1/2（X-3）^ 2 = 8

（X-3）^ 2 = 16

-3 = -4或x-3的= 4

X1 = -1 X2 = 7

X ^ 2-12X-2010 = 0

X ^ 2-12X = 2010

X ^ 2-12X + 36 = 2010 +36

（X-6）^ 2 = 2046

X-6 = - √2046或X-6 =√2046

X1 = 6 - √2046×2 = 6 + √2046

-3倍的2 5倍2 = 0
3 ^ 2 5的x 2 = 0 第（x +2）（3×1）= 0 BR /> X1 = -2×2 = 1/3