Question

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



3x2 + 18x = 21





A.


{–19, 13}


B.


{–25, 7}


C.


{–7, 1}


D.


{–13, –5}

Answer 1

@texaschic101

Answer 2

An equation in which one side is a perfect square trinomial can be easily solved by taking the square root of each side.

Answer 3

What

Answer 4

Okay lets work this out ..

Answer 5

1st Keep all x related terms on one side and move the constant to the right.

Answer 6

next Balance the equation.

Answer 7

I'm lost

Answer 8

Ok so consider the equation: 3x^2 + 18x = 21
Our solution strategy will be to get a perfect square trinomial of the form a^2 + 2ab + b^2 = (a + b)^2

Answer 9

on the left hand side of the equation.