jakayla27
jakayla27
24-08-2016
Mathematics
contestada
(12y2+17y-4)+9y2-13y+3)
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Krose1
Krose1
24-08-2016
add together the same variables. 12y^2 = 9y^2 becomes 21y^2. 17y - 13y is 4y. and -4 +3 is -1. so the answer is 21y^2 +4y -1
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