解下列方程 (1), (X-3)눀-16=0 (2),

解下列方程 (1), (X-3)눀-16=0 (2), (X+1)(X+3)=6X+4
2024-12-20 17:55:24
推荐回答(4个)
回答1:

(X-3)²-16=0
(X-3)= ±4
X1 = 1, X2 = -1
 
(X+1)(X+3)=6X+4
X²+4X+3=6X+4
X²-2X-1=0
(X-1)²=2
X1=√2+1  X2=-√2+1

回答2:

回答3:

(1) (x-3)²-16=0
(x-3)²=16
x-3=±4
x=3±4
x1=-1
x2=6

(2) (x+1)(x+3)=6x+4
x²+4x+3-6x=4
x²-2x=1
(x-1)²=1+1
x-1=±√2
x=1±√2
x1=1-√2
x2=1+√2

回答4: