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Mathematics 21 Online
OpenStudy (anonymous):

What is the coefficient of the second term of the trinomial? (3x + 3)^2 = 9x^2 + _________ x + 9

Nnesha (nnesha):

(3x + 3)^2 is same like (3x + 3)(3x+3) so multiply this two bracket

Nnesha (nnesha):

another way take square of first which is 9x^2 and then take square of last one which is 9 and then add two them for middle terms|dw:1418328691878:dw|

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