Answer:
1. -3 & -1
2. 4 & 1
3. 7 & -7
4. 5/2 & -5/2
5. -3 & -1 or 3 & 1 not sure with this one
Step-by-step explanation:
1. x2+4x+3=0
(x + 3)(x + 1) =0
x=-3 x=-1
2. x2 - 5x + 4 = 0
(x - 4)(x - 1) = 0
x=4 x=1
3. x2 - 49 = 0
(x - 7)(x + 7) = 0
x = 7 x = -7
4. 4x2 - 25 = 0
(2x -5)(2x + 5) = 0
2x/2 = 5/2. 2x/2=-5/2
x= 5/2 x=-5/2
5.2x2 + 7x + 3 = 0
(-x -(-3))(-2x -(-1))=0
x=-3 x=-1/x=3 x=1. not sure tong five
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Answers & Comments
Answer:
1. -3 & -1
2. 4 & 1
3. 7 & -7
4. 5/2 & -5/2
5. -3 & -1 or 3 & 1 not sure with this one
Step-by-step explanation:
1. x2+4x+3=0
(x + 3)(x + 1) =0
x=-3 x=-1
2. x2 - 5x + 4 = 0
(x - 4)(x - 1) = 0
x=4 x=1
3. x2 - 49 = 0
(x - 7)(x + 7) = 0
x = 7 x = -7
4. 4x2 - 25 = 0
(2x -5)(2x + 5) = 0
2x/2 = 5/2. 2x/2=-5/2
x= 5/2 x=-5/2
5.2x2 + 7x + 3 = 0
(-x -(-3))(-2x -(-1))=0
x=-3 x=-1/x=3 x=1. not sure tong five