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HelloKitty17
 one year ago
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HelloKitty17
 one year ago
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HelloKitty17
 one year ago
Best ResponseYou've already chosen the best response.1Which polynomial is a perfect square trinomial? 36x2  18x  9 4a2  28a  49 25b2  40b + 16 4x2  6x + 9

OregonDuck
 one year ago
Best ResponseYou've already chosen the best response.1I'll explain :) 36x2 − 18x − 9 The formula is (x2)^2 = x^24x+4 So plus should be in the end but there is minus so this can't be the perfect square xD 4a2 − 28a − 49 Same case minus is there instead of plus 25b2 − 40b + 16 This is perfect square because 25b2 − 40b + 16 (5b)^22(5b)(4)+(4)^2 (5b4)^2 4x2 − 6x + 9 This even cant be the perfect square So, option C is the answer xD
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