Question

Find the zero : y=36x^2+36x+9
Ugh how to solve this one. :"(

Answer 1

try and reduce it first div by 9

Answer 2

so 4x+4+1?

Answer 3

not quite 4x^2 + 4x +1 now factor

Answer 4

ah i don't know how to factor that

Answer 5

What is the common factor?

Answer 6

And highest.

Answer 7

2 and 4?

Answer 8

ok I will show you one wayS:
(2x )(2x ) first term mult = 4x^2
(2x 1 )(2x 1 ) our last term is +1 it (-1)(-1) or(1) (1)
we know our middle term is 4x=2x+2x we get this by mult outside terms and inside terms so
(2x+1)(2x+1) is our factor

Answer 9

is there any shortcut method

Answer 10

i can't understand that one. how'd u got 2x?

Answer 11

well if you have x^2 you can see it is x times x
4x^2 = 2x

Answer 12

how about the remaining 4x+1 ?

Answer 13

I am using the Foil method in reverse multiply the first outside inside last
so I have to figure out the first terms 2x times 2x is a good bet because it equals 4x^2

Answer 14

oh okaaay thanks a lot

Answer 15

did you get how to find the zero

Answer 16

-1/2 ?

Answer 17

is that correct?

Answer 18

Yes, if 2x+1 = 0, then x = -1/2

Answer 19

@MCath

Answer 20

good job