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Q: What the answer to 4x2 plus 12 plus 9 equals 0?

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There are four solutions to 9x4 plus 27x3 - 4x2 - 12x equals 0. One of the solutions is x = -3.

x2-5-4x2+3x = 0 -3x2+3x-5 = 0 or as 3x2-3x+5 = 0

Assuming that 4x2+2x = 0: 2x (2x+1) = 0 2x = 0 or 2x+1 = 0 x = 0 or -1/2

4x2 - 2x = 0

4x2+50x = 0 4x(x+12.5) = 0 x = 0 or x = -12.5

(2x + 3)(2x + 3)

-((4x + 1)(x - 1))

dont know sorry

1/2 , 3/2

4x2 = -12x, divide both sides by 4x: x = -3

sure it does... that would be true

2.

If you can't factor it easily, use the quadratic formula.

4x2 - 13 x + 3 = 0 (4x - 1)(x - 3) = 0 x = 3, 1/4

4x2-5x+1 = 0 (4x-1)(x-1) = 0 x = 1/4 or x = 1

N=0.

8 (eight)

(x3 + 4x2 - 3x - 12)/(x2 - 3) = x + 4(multiply x2 - 3 by x, and subtract the product from the dividend)1. x(x2 - 3) = x3 - 3x = x3 + 0x2 - 3x2. (x3 + 4x2 - 3x - 12) - (x3 + 0x2 - 3x) = x3 + 4x2 - 3x - 12 - x3 + 3x = 4x2 - 12(multiply x2 - 3 by 4, and subtract the product from 4x2 - 12)1. 4x(x - 3) = 4x2 - 12 = 4x2 - 122. (4x2 - 12) - (4x2 - 12) = 4x2 - 12 - 4x2 + 12 = 0(remainder)

This could be intended as a trick question; the answer is 0. 0 + 6 = 12 - 6

4x2-2x = 0 2x(2x-1) = 0 x = 0 or x =1/2

Discriminant = b2-4ac = (-2)2-(4*4*4) = -60

-4x2 + 5x + 6 = 0 Multiply through by -1: 4x2 - 5x - 6 = 0 (I prefer the leading coefficient to be >0) 4x2 - 8x + 3x - 6 = 0 4x(x - 2) + 3(x - 2) = 0 (x - 2)(4x + 3) = 0 So x - 2 = 0 or 4x + 3 = 0 ie x = 2 or x = -3/4

12 plus 0 is 12

Using the quadratic equation formula:- x = -0.5447270865 or x = 2.294727086

-4x2 + 6x + 40 = 0 ∴ -2x2 + 3x + 20 = 0 ∴ -2x2 - 8x + 5x + 20 = 0 ∴ -2x(x + 4) + 5(x + 4) = 0 ∴ (5 - 2x)(x + 4) = 0 ∴ x ∈ {5/2, -4}