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You are here: Experts > Science > Math for Kids > Basic Math > simplify expressions
Basic Math - simplify expressions
Expert: Lynn Houston - 10/22/2009
Question
a) 5 + 2(x + 1) my answer 7x+7 book 7 + 2x
b) 3x + 4(2x − 1) my answer 6x^2+5x-4 book 11x −4
c) 6a − 3(a + 2) my answer 6a^2+9a-6 book 3a −6
d) x^2 − x(1 + x) my answer x^3-x book −x
Are any of these right,if not,where am i going wrong? I've checked the chapters, and it corresponds with the page number and section.
thankyou
Answer
a) 5 + 2(x + 1) my answer 7x+7 book 7 + 2x
5 + 2x + 2
7 + 2x
b) 3x + 4(2x − 1) my answer 6x^2+5x-4 book 11x −4
3x + 8x - 4
11x - 4
c) 6a − 3(a + 2) my answer 6a^2+9a-6 book 3a −6
6a - 3a - 6
3a -6
d) x^2 − x(1 + x) my answer x^3-x book −x
x^2 - x - x^2
-x
It appears that you are treating the first section as if it were in parenthesis
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