# Algebra 1

posted by Tris

1) what is the simplified form of (x-2)(2x+3)? Use the distributive property.
A) 2x^2-x-6
B) 2x^2-6
C)2x^2-7x-6
D) 2x^2 +x-6****

2) what is the simplified form of (3x+2)(4x-3) use a table.
A)12x^2+18x+6
B) 12x^2+x-6
C) 12x^2+18x-6****
D)12x^2-x-6

3) what is the simplified form of (4p-2)(p-4)
A)4p^2+6p-16
B)4p^2-18p+8
C)4p^2-14p-6
D)4p^2-6p+16****

4) the radius of a cylinder is 3x-2 cm. the height of a cylinder is x+3 cm. what is the surface area of the cylinder? Use the formula A=2pi r^2+2pi rh
A) 2pi(3x^2+10x-8)
B) 2pi(12x^2+7x-2)
C) 2pi(12x^2-2x+13)
D) 2pi(12x^2-5x-2)
Pi=the pi symbol I didn't know how to do that

5) what is the simplified form of (2x^2+4x-3)(3x+1)
A) 6x^3+10x^2-5x+5
B) 6x^3+14x+5x-3
C) 6x^3+14x^2-5x-3
D) 6x^3-10x^2-5x-3

1. Tris

@mssue

2. Reiny

#1, your middle term is -x , thus A

#2 D

#3 B
How are you doing these, so far they are all wrong
(4p-2)(p-4)
= 4p^2 - 16p - 2p + 8
= 4p^2 - 18p + 8

#4
A = 2πr^2 + 2πrh
= 2π(3x-2)^2 + 2π(3x-2)(x+3)
= 2π[ 9x^2 - 6x - 6x + 4 + 3x^2 + 9x - 2x - 6]
= 2π[12x^2 - 5x - 2] ,
which is D

#5
(2x^2+4x-3)(3x+1)
= 6x^3 + 2x^2 + 12x^2 + 4x - 9x - 3
= 6x^3 + 14x^2 - 5x - 3

I think you will need more practise with these.

3. Tris

Thank you so much, and I know I have been practicing then I jut for some reason don't undertsand

4. Meh

A
D
B
D
C

5. the pretty princess

@Meh is correct

6. seb

4.2(2-2x)=-3x
a.-4
b.4
c.6**
d.0

is that right??

7. Ur butt

meh is 100% correct thanks

8. MehIsCorrect

MehIsCorrect

9. me

A
D
B
D
C
D

10. anon

me is all right

11. personification personified

me, is correct.

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