Week6-Precalculus11-Factoring Trinomials

First step of learning how to factor is to start with knowing how to change into factor form.

  1. If you get and equation like (2x + 1)(x+2) you start by multiplying the 2x and the x, next is the 2x and 2. After completing this begin to do the same with the one.
  2. (2x+1)(x+2)= 2x²+4x+x+2
  3. Next add all the same, 2x²+5x+2
  4. After completing on learning how to do this we are going to learn how to factor

Factoring a trinomial:

  1. If you get an equation like 8x²+2x-15
  2. Start by knowing that two number in the equation multiplied together is going to result in the pink number highlighted, next is the middle number highlighted in green, how to get it is by adding two numbers together.
  3. Start by writing it out, (_x+_)(_x-_)
  4. now what two numbers multiplied together equals 8, (2x+_)(4x-_)
  5. 3 and 5 equal to 15 so next, (2x+3)(4x-5)
  6. Now we check
  7. (2x+3)(4x-5), 8x²-10x+12x-15
  8. 8x²+x-15

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