SOLUTION: please help me to solve this equation (x-3)(8x+12)

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Question 151504: please help me to solve this equation (x-3)(8x+12)
Found 2 solutions by checkley77, jim_thompson5910:
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
(x-3)(8x+12)
8x^2+12x-24x-36
8x^2-12x-36
4(2x^2-3x-9)

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
This is not an equation. So you cannot solve it, but you can simplify.




%28x-3%29%288x%2B12%29 Start with the given expression.


Now let's FOIL the expression.


Remember, when you FOIL an expression, you follow this procedure:


%28highlight%28x%29-3%29%28highlight%288x%29%2B12%29 Multiply the First terms:%28x%29%2A%288%2Ax%29=8%2Ax%5E2.


%28highlight%28x%29-3%29%288x%2Bhighlight%2812%29%29 Multiply the Outer terms:%28x%29%2A%2812%29=12%2Ax.


%28x%2Bhighlight%28-3%29%29%28highlight%288x%29%2B12%29 Multiply the Inner terms:%28-3%29%2A%288%2Ax%29=-24%2Ax.


%28x%2Bhighlight%28-3%29%29%288x%2Bhighlight%2812%29%29 Multiply the Last terms:%28-3%29%2A%2812%29=-36.


8%2Ax%5E2%2B12%2Ax-24%2Ax-36 Now collect every term to make a single expression.


8%2Ax%5E2-12%2Ax-36 Now combine like terms.


So %28x-3%29%288x%2B12%29 FOILS to 8%2Ax%5E2-12%2Ax-36.


In other words, %28x-3%29%288x%2B12%29=8%2Ax%5E2-12%2Ax-36.