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Mathematics
Big Foot
10 May, 14:04
Solve the equation x^2-4x-21=0
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Kolby Leon
10 May, 15:43
0
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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