Question

Can some one give me the answers 15 points

Answer 1

I know all the anwers but it won't help you to give you al the answers, so I wil solve all of each type
8 and 9 are similar, so I will solve 9
10 is one
11 is last


I will solve 9,10,11



9.
convert into ax^2+bx+c=0 form
add 4x^2 to both sides
4x^2+5x+9=0
for
ax^2+bx+c=0
x=
`(-b+/- √(b^2-4ac) )/(2a)`
x=
`(-5+/- √(5^2-4(4)(9)) )/(2(4))`
x=
`(-5+/- √(25-144) )/(8)`
x=
`(-5+/- √(-119) )/(8)`
no real soltuions, D

(number 8, would be x=
`(-10+/- √(10^2-4(1)(-39)) )/(2(1))`, simplify it yourself)


10. difference of 2 perfect squares, recognize it and do no work
(a-b)(a+b)=a²-b²
(3x-4)(3x+4)=(3x)²-(4)²=9x²-16
B

11.
to move an equation c units to the right, minus c from every x
that is what happend
minus 2
moved to the right 2 units
B is answer



8. simplify x=
`(-10+/- √(10^2-4(1)(-39)) )/(2(1))` yourself to get answer
9. D
10. B
11. B