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Q: What is x squared plus x -42?

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It is (x+6)(x+7) when factored

42 squared - or 42 x 42 is 1764

x = ? 42 = x squared minus x

42 + x2 = 13x ∴ x2 - 13x + 42 = 0 ∴ (x - 6)(x - 7) = 0 ∴ x ∈ {6, 7}

3060.

They are equal. 7 squared is 7 x 7, which equals 49. 6 x 7 = 42, plus another 7 = 49.

x[x+1] squared Simplified is, to my knowledge, x squared plus ( x + 1) squared

(x+y)2

(a + x^2)(b + y^2)

It is a quadratic expression in the variable x.

X = √63

x=9 squared

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