Question

Quick factoring quadratic question!!

Answer 1

whats the question?

Answer 2

okay do u know how to solve by factoring?

Answer 3

i do but i cant get it

Answer 4

okay so when we have a quadratic for instance this one : 8x^2-26x-7=0 we can use the factoring method so we can add seven each side to get 8x^2-26x+__ = 7 then we need to take out the 8 from the equation 8(x^2-3.25x+__ =7 then we need to complete the square on the left side of the equation meaning we need to divide -3.25/2 then square it to get a value (2.640) which we add to both sides to get 8(x^2-3.25x+2.640) =7 are you with me?

Answer 5

oh also in the end i forgot to add 2.640 to the 7 u have to add it to both sides

Answer 6

uhhh, dude you are wrong, you first have to factor it into()()

Answer 7

i know i am getting there hold on lol so then we go to factoring like ()() so we need a number that adds up to -3.25 and multiplies to be 2.640 so 8(x-1.625)(x-1.625) then we can combine the both into 8(x-1.625)^2= 9.640 then u subtract 9.640 both sides and get 8(x-1.625)^2 - 9.640 get it?

Answer 8

it feels like that i have to teach you the math lol

Answer 9

but thx 4 trying

Answer 10

lol maybe i stretched it too much ohh u can just factor in the beginning -_- i feel stupid lol so u have to find a number that adds up to -26 and multiplies to be -56 like -28 and 2 and we get 8x^2 +2x -28x -7 then we group them (8x^2+2x) + (-28x-7) and then we take out the common factors 2x(4x+1) -7(4x+1) then it becomes (2x-7)(4x+1)=0 yes!!! i got it lol sorry i stretched it too much

Answer 11

:(