Question: Find the values for a, b, c, and d as you follow these steps to complete the square for 15x2 + 21x. 15x2 + 21x

Find the values for a, b, c, and d as you follow these steps to complete the square for 15x2 + 21x.
15x2 + 21x
15(x2 + ax)
15(x2 + ax + b) - 15b
15(x2 + ax + b) - c
15(x + d)2 - c

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