Factor: x2 + 3x + 7x + 21

x^2 + 3x + 7x + 21 = x^2 + 10x + 21 = (x+7)(x+3)

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Asked 6/28/2012 7:52:16 PM

Updated 7/1/2012 2:42:47 AM

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Factor: x2 – 1

Weegy: x ² - 1 = (x - 1) (x + 1)
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(x - 1) (x + 1)
x (x + 1) - 1 (x + 1)
x ² + x - x - 1
x ² - 1 (More)

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Asked 6/28/2012 7:58:40 PM

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Factor: 4x2 – 81y2

Weegy: 4x² - 81y² = 0
4x² = 81y²
x² = 81/4y²
x = ± 9/2y
= x - 9/2y, = 2x - 9y
= x + 9/2y, = 2x + 9y
Answer: (2x - 9y)(2x + 9y) (More)

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Asked 6/28/2012 8:03:57 PM

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x2 – 11x + 18

Weegy: x = 9, x = 2 (More)

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Asked 6/28/2012 8:31:55 PM

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Solve for x: x2 – 6x – 40 = 0

Weegy: 36x^2-7x-5=0, next we simplify further, 36x^2-7x=5, we can simplify further? Would you like me to do so? User: 36x^2-7x-5=0, next we simplify further, 36x^2-7x=5, we can simplify further? Would you like me to do so? Weegy: 36x^2-7x-5=0, next we simplify further, 36x^2-7x=5, we can simplify further? Would you like me to do so? (More)

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Updated 9/4/2012 8:25:26 AM

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Solve for x: x2 – 64 = 0

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Updated 7/1/2012 2:41:30 AM

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by factoring

(x - 10)(x + 4) = 0

x - 10 = 0

x = 10

x + 4 = 0

x = -4

So the value of x are 10 and -4.