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Q: Is it a perfect square 4x2 plus 12x plus c?

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4x2 + 12x + 5 = (2x + 1)(2x + 5).

(√4x^2)(√36x)=2x(6√x)=12x√x

49 Check when:- 4x2-28x+49 = 0 (2x-7)(2x-7) = 0 x = 7/2 and also x = 7/2

In real numbers there is no square root of -4x2 However, when using complex numbers where √-1 = i, then: √-4x2 = 2xi If you were asking, for example, with regard to the difference of two squares, eg y2 - 4x2, then you are actually finding the square root of 4x2 which is 2x, giving: y2 - 4x2 = (y + 2x)(y - 2x)

b. -4x2+20 = 4x2 = 4-20x2 = -16x = -4Note that -42 = -16 but (-4)2 in brackets = 16

Related questions

4x2 + 12x + 5 = (2x + 1)(2x + 5).

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

false!

4x2+12x = 4x(x+3) when factored

12x * 4x2 = 48x3

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

64

16

4x2 + 12x + 5 = 4x2 + 2x + 10x + 5 = 2x(2x+1) + 5(2x+1) = (2x+1)(2x+5)

4x2-42x+110 = (2x-10)(2x-11) when factored

4(x + 2)(x + 1)

(2x+5)(2x+1)

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