SOLUTION: 2a(a – 5) + 4(a – 5) how do I work this expression out to simplest form.
I need to learn how to explain each step of showing work. How do I do it?
Thanks~
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Question 846630: 2a(a – 5) + 4(a – 5) how do I work this expression out to simplest form.
I need to learn how to explain each step of showing work. How do I do it?
Thanks~
Answer by josh_jordan(263) (Show Source): You can put this solution on YOUR website!
If you required to express in simplest factor form, you can first factor out (a - 5) from the expression, giving you
(a - 5)(2a + 4)
If you are required to expand the factors and express in polynomial form, you would then use the FOIL method on (a - 5)(2a + 4):
(a x 2a) + (4 x a) + (-5 x 2a) + (-5 x 4) =
2a^2 + 4a - 10a - 20
Combining like terms gives us:
2a^2 - 6a - 20
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