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german
3 years ago
10

Solve the equation x^2-4x-21=0

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
3 0

Answer:

x = 7 and x = -3

Step-by-step explanation:

x^2-4x-21=0

you can factor to get

(x-7)(x+3)=0

then set each equal to 0

x - 7 = 0 and x + 3 = 0

then just solve for x!

x = 7 and x = -3

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4 years ago
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7 0
3 years ago
Read 2 more answers
QUESTION 3
eduard

Athe answer is -2  because it is behind the 0 and will be negative and it is two lines away from the 0 so the answer is -2

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