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Q: What is x2 plus 4x plus 4 equals 25?

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y = 4x-3

No.

x^2+4x+7

2x = x2 + 4x - 3 x2 + 2x - 3 = 0 (x - 1)(x - 2) = 0

x2 + 4x + 3 = 0 (x + 1)(x + 3) = 0 x ∈ {-3, -1}

y=-x^2+4x-3

Y = x2 + 4x + 11OK. That's very interesting.Is there a question ?

x(x+4) equals x2 plus 4x

You need to know the value of x

x2 + 4x = 0 ⇒ x(x + 4) = 0 ⇒ x = 0 or x = -4

x3 + x2 + 4x + 4 = (x2 + 4)(x + 1)

x2 + 4x - 9 = 5x + 3 ∴ x2 - x - 12 = 0 ∴ (x + 3)(x - 4) = 0 ∴ x ∈ {-3, 4}

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