SOLUTION: multiply (x+5)(3x-8) A 3x^2-40x+7 b x^2+7x+7 c 3x^27x-40 d 3x^2+6x-40 ^ means to the power of example 3^3 three to the power of

Algebra ->  Distributive-associative-commutative-properties -> SOLUTION: multiply (x+5)(3x-8) A 3x^2-40x+7 b x^2+7x+7 c 3x^27x-40 d 3x^2+6x-40 ^ means to the power of example 3^3 three to the power of       Log On


   

Question 336026: multiply
(x+5)(3x-8)
A 3x^2-40x+7
b x^2+7x+7
c 3x^27x-40
d 3x^2+6x-40

^ means to the power of example 3^3 three to the power of
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

%28x%2B5%29%283x-8%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%2B5%29%28highlight%283x%29-8%29 Multiply the First terms:%28x%29%283x%29=3x%5E2.


%28highlight%28x%29%2B5%29%283x%2Bhighlight%28-8%29%29 Multiply the Outer terms:%28x%29%28-8%29=-8x.


%28x%2Bhighlight%285%29%29%28highlight%283x%29-8%29 Multiply the Inner terms:%285%29%283x%29=15x.


%28x%2Bhighlight%285%29%29%283x%2Bhighlight%28-8%29%29 Multiply the Last terms:%285%29%28-8%29=-40.


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So we have the terms: 3x%5E2, -8x, 15x, -40


3x%5E2-8x%2B15x-40 Now add every term listed above to make a single expression.


3x%5E2%2B7x-40 Now combine like terms.


So %28x%2B5%29%283x-8%29 FOILs to 3x%5E2%2B7x-40.


In other words, %28x%2B5%29%283x-8%29=3x%5E2%2B7x-40.


If you need more help, email me at jim_thompson5910@hotmail.com

Also, feel free to check out my website.

Jim