Answer:
Step-by-step explanation:
The problem solver "completed the square." He or she took half of the coefficient of x and squared the result, and then added this square and subtracted this square to/from both sides of the equation.
The gcf of 18 and 20 is 2, so your answer is:
2(9+10)
4.25(15)+4.25(1.5)(7)+0.21(1345)=
63.75+44.625+282.45=$390.825
=$390.83
brainly won't let me type my answer out so i'll just put it in the comments, sorry if it's inconvenient.
