Question

Plz Help!


1) Simplify the following algebraic expressions.

-6x + 5 + 12x -6

2(x - 9) + 6(-x + 2) + 4x

3x2 + 12 + 9x - 20 + 6x2 - x

(x + 2)(x + 4) + (x + 5)(-x - 1)


2) Find any real solutions for the following quadratic equations.

2 x2 - 8 = 0

x2 = -5

Answer 1

For the 1st part combine all alike terms. For example 1 -6x+5+12x-6 would simplify to 6x-1

Answer 2

-6x + 5 + 12x -6
add the number together and the variables together

Answer 3

3x2 + 12 + 9x - 20 + 6x2 - x
add the numbers together and the variables together but look to the power here the have to have the same power

Answer 4

2(x - 9) + 6(-x + 2) + 4x
a(c-d)=a*c-a*d
use this for both then just add them

Answer 5

oh ok i see

Answer 6

#2
2 x2 - 8 = 0
1- add +8 for both sides
2x^2-8+8=8
2x^2=8
2- divied both sides by 2
x^2=8/2=4
3- take the sqrt of it
x=sqrt(4)=+-2

Answer 7

okay good luck....
Note sqrt(-#) is not a real

Answer 8

thanks