Question

3.Solve x2 + 18 = –9x. (1 point)
4.Solve 4x2 = 12x
please help by solving completing the square please show work

Answer 1

3. x=-2
4.x=3/4

Answer 2

i cant see 3 clearly is it 2x or 2

Answer 3

xsquared

Answer 4

x^2

Answer 5

3.
x^2+18=-9x
x^2+9x+18=0
(x+6)(x+3)

Either x=-3 or x=-6

4.
4x^2=12x
4x^2-12x=0
4x(x-3)=0
Either x=0 or x=3

Answer 6

x^2+9x+18=0
x^2+6x+3x+18=0
2x(x+3)+3(x+3)
(2x+3)(x+3)
x=-3,-3/2

Answer 7

8/12=x
x=3/4

Answer 8

4.Solve 4x2 = 12x + 40. (1 point) typo this is the equation for #4

Answer 9

sorry

Answer 10

ok 8-40=2x
-32=2x
-32/2=x
x=-16

Answer 11

if is correct tell me

Answer 12

4x^2=12x+40
4x^2-12x-40=0

let f(x)=4x^2-12x-40 (function)
Replace the value of x in such a way to obtain zero

f(-2)=0
(x+2) is a factor of f(x)

4x^2-12x-40=(x+2)(4x-20)=0
Either x=-2 or (4x-20=0>> x=5)

Answer 13

thank yuh thunderemperor

Answer 14

You're welcome. ;)