Mathematics
devinisawesome
2016-04-16 01:02:12
Write -3x^2-18-31 in vertex form.
ANSWERS
UlrikeFeyen196
2016-04-16 06:49:18

get into form a(x-h)²+k complete the square -3x²-18x-31 group x terms (-3x²-18x)-31 undistribute the -3 -3(x²+6x)-31 take 1/2 of the linear coefient (6) and squaer it 6/2=3, 3²=9 add positive and negative of it inside parenthasees -3(x²+6x+9-9)-31 complete the square -3((x+3)²-9)-31 expand -3(x+3)²+27-31 -3(x+3)²-4 is vertex form

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