How do you express the product (2x-1)(3x+4) as a trinomial?

1 Answer
David Drayer
Jun 6, 2018

6x^2 +5x -4

Explanation:

The problem of a binomial times a binomial is like multiplying a two digit number times a two digit number.

Set it up as two by two matrix. 

 ...... 2x           -1

3x .. 6x^2........ -3x

+4 ..... +8x ......... -4
+
Combining the like terms of - 3x and + 8x gives +5x

So the trinomial is 6x^2 + 5x -4

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