Step 1: Identify constants $ a $ , $ b $ and $ c $.
$ a $ is a number in front of the $ x^2 $ term $ b $ is a number in front of the $ x $ term and $ c $ is a constant. In this case:
Step 2: Multiply the leading coefficient $\color{blue}{ a = 2 }$ by the constant term $\color{blue}{c = 3} $.
$$ a \cdot c = 6 $$Step 3: Find out two numbers that multiply to $ a \cdot c = 6 $ and add to $ b = -5 $.
Step 4: All pairs of numbers with a product of $ 6 $ are:
PRODUCT = 6 | |
1 6 | -1 -6 |
2 3 | -2 -3 |
Step 5: Find out which factor pair sums up to $\color{blue}{ b = -5 }$
PRODUCT = 6 and SUM = -5 | |
1 6 | -1 -6 |
2 3 | -2 -3 |
Step 6: Replace middle term $ -5 x $ with $ -2x-3x $:
$$ 2x^{2}-5x+3 = 2x^{2}-2x-3x+3 $$Step 7: Apply factoring by grouping. Factor $ 2x $ out of the first two terms and $ -3 $ out of the last two terms.
$$ 2x^{2}-2x-3x+3 = 2x\left(x-1\right) -3\left(x-1\right) = \left(2x-3\right) \left(x-1\right) $$