Complete the square (or the following content). Then rewrite the trinomial as a square of a binomial. For example, (x+3)^2. 1. 7+12x+2 18x + ? 3x^2+4x+? 4x^2+3x+?
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18x + ? To complete the square for this expression, we need to add and subtract the square of half of the coefficient of x. Half of 18 is 9, so we add and subtract 9^2 = 81. 18x + 81 - 81 Now we can rewrite this as a square of a binomial: (3x + 9)^2 - 81 Show more…
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