急,大家可唔可以教吓我解方程啊4

用取平方根法解下列各方程 [第1-4題]

(如有需要,答案以根號表示)

1. (x+3)2 = 25
x+3 = √25 or x+3 = -√25
x+3 = 5 or x+3 = -5
x = 2 or x = -8


3. (2x+1)^2 =9/64
2x+1 = √9/64 or 2x+1 = -√9/64
2x = 3/8 -1 or 2x = -3/8 -1
2x = -5/8 or 2x = -11/8
x = -5/16 or x = -11/16

4. (x-4)^2 = 10
x-4= √10 or x-4= -√10
x= √10 +4 or x= -√10 +4


用取平方根法解下列各方程 [第6題]

(答案須淮至二位小數)

6. (5-x)^2 = 13
5-x= √13 or 5-x= -√13
-x= √13 -5 or -x= -√13 -5
x= 5 -√13 or x= 5+√13
x=1.39 or x= 8.61


用取平方根法解下列各方程

(答案以根號表示)

7. (5x-3)^2 = 2
5x-3= √2 or 5x-3= -√2
5x= √2 +3 or 5x= -√2 +3
x= (√2 +3)/5 or 5x= (-√2 +3)/5

As follow AS~~~~~~

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1. (x+3)2 = 25

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3. (2x+1)2 =9/64

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4. (x-4)2 = 10

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7.(5x-3)2 = 2

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