Posted by Lauren on Wednesday, April 14, 2010 at 7:47pm.
All the directions say for these three problems is multiply and simplify. Are my answers correct? Thank you
A)(x^2+2x3)+(2x^2x+1)
Answer: 2x^36x^2+4x
B)(x+1)(2x1)
Answer: 3x1
C)(x2)(x^2+2x3)
Answer: x^37x+6

Math Check  Damon, Wednesday, April 14, 2010 at 7:57pm
A) You have a plus sign in the first one so it is add, not multiply. It is wrong anyway for adding or multiplying.
B) One way to do these is to split them up using the distributive property
(x+1)(2x1) = x(2x1) + 1 (2x1)
= 2 x^2  x + 2x  1
= 2 x^2 + 1x  1
C) x(x^2+2x3) 2(x^2+2x3)
x^3 +2x^2 3x 2x^2 4x +6
= x^3 7x +6

Math Check  Lauren, Wednesday, April 14, 2010 at 8:04pm
Srry the problem for a is suppose to be 2x(x^23x+2) this is my answer
2x^36x^2+4x

Math Check  Damon, Wednesday, April 14, 2010 at 8:07pm
yes
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