Multiply the polynomials (x+3)(2x-4). what is the product in the form ax^2+bx+c?

We want to multiply two polynomials of degree 1, and get in that way a polynomial of degree 2.

We will get the polynomial:

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We just want to multiply (x + 3) and (2*x - 4).

So we start by writing:

Now we just expand this:

Now we need to simplify the above expression:

This is the polynomial we wanted to get:

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6 adults and 9 children went.

a + c = 15

12a + 9c = 153

12(6) + 9(9) = 153

72 + 81 = 153