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Maci Baldwin
Mathematics
15 May, 17:09
Solve x2 + 7x + 12 = 0 for x
+4
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Ada Solis
15 May, 17:19
0
x^2 + 7x + 12 = 0
We know that 4 times 3 is 12.
We also know that 4 plus 3 is 7.
This is all we need to know to create our two factors.
(x + 3) (x + 4) = 0
Set each factor to 0 and solve for x.
x + 3 = 0
x = - 3
x + 4 = 0
x = - 4
Answer: x = - 3, x = - 4
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Josh Burns
15 May, 17:24
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-4/3
Step-by-step explanation:
Isolate x.
x2 + 7x + 12 = 0
2x + 7x + 12 = 0
9x + 12 = 0
9x = - 12
x = - 12/9
x = - 4/3
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