Question

Fan and Medal

Solve the following equation by transforming it into a perfect square trinomial.



3x^2 + 18x = 21











A.

{–13, –5}








B.

{–25, 7}








C.

{–19, 13}








D.

{–7, 1}

Answer 1

@aajugdar

Answer 2

put 21 to other side n divide everything by 3

Answer 3

you get x^2+6x-7=0
which is (x-1) (x+7) =0
so you get x=1 or x=-7

Answer 4

so answer is D

Answer 5

ur answer is D