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6.4 and 6.5 Factoring Trinomials. “Using Bottom’s Up Method”. The X factor. To begin factoring trinomials draw a BIG X East and West multiplied together = North East and West added together =South. North. East. West. South. The X Factor. Do the worksheet .
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6.4 and 6.5 Factoring Trinomials “Using Bottom’s Up Method”
The X factor • To begin factoring trinomials draw a BIG X • East and West multiplied together = North • East and West added together =South North East West South
The X Factor • Do the worksheet
The X Factor: How to put a trinomial in the X • Make sure the polynomial is in descending order: ax² +bx +c • If ax² is – factor out a -1 before you begin • If there is a common factor, factor it out before you begin to put it in the X • Multiply a and c to get the North term • Write b in the South • Find what two numbers add to get the south and multiply to get the north. Those two numbers are your east and west
X Factor: 4 Options + + + - - + - + - - Larger # + Larger # - Smaller # - Smaller # + - +
The X Factor: With Trinomials • Worksheet
Bottom’s Up • Factor out a common factor • Draw your X and do the X Factor • Make East an d West your binomials (x + west) (x + East) • Divide West and East by the # in front of x² 5. Simplify (reduce fraction) 6. Bring the bottom number up in front of x
