Question

c=−30x2+1140x+9ˏ450
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Answer 1

mhm

Answer 2

\(\bf c=−30x^2+1140x+9ˏ450\implies c = 30(x^2-38x+315)\)

Answer 3

hmm forgot the minus \(\bf c=-30x^2+1140x+9ˏ450\implies c = -30(x^2-38x+315)\)

so... there, to find "x", set c = 0 and factor the quadratic