Really Hard Maths

i have got some work which i dont understand how to do
i have to find x from the formula x^2+4x+4=0 i have no idea were to start i tried x^2+4x=4 then x(x+4)=4 so x=4 and x=1 but the back of the book says x=-2 is the book wrong?

factorize the quadratic or use the quadratic formula.

do you remember this from your GCSE?

Aren't facorising it correctly. What you should be trying to do is be trying to split x^2 + 4x + 4 into 2 brackets. E.g (x * ?)(x * ?)

so like (x+4x)(x+4)?

i did factorize it but the answer is wrong? i dont think we done quadratic formula yet

i have got some work which i dont understand how to do
i have to find x from the formula x^2+4x+4=0 i have no idea were to start i tried x^2+4x=4 then x(x+4)=4 so x=4 and x=1 but the back of the book says x=-2 is the book wrong?

book is correct

factorize into 2 brackets with the right hand side = 0

(x+...)(x+...)=0

does this ring any bells?

PS what course are you doing?

Your method doesn't work - try putting x = 1 or x = 4 into your original equation and you'll see why!

Have you learned how to solve quadratic equations?

not sure what u are doing how do I get 0 from my formula? and how do I get the 2 brackets?

Like (x+4)(x+4)

That's not the answer though

not sure what u are doing how do I get 0 from my formula? and how do I get the 2 brackets?

whats wrong with x=1? 1^2+4+4=9 whats wrong?

Have you been through this in class or with a teacher?

You shouldn't be trying to tackle something like this if you haven't been taught the method to begin with

how do i do this because (x+4)(x+4)=x^2+16 how does that help?

for example

if (x-2)(x+5)=0

then either
x-2=0
x=2

or
x+5=0
x=-5

I have to teach myself (cannot afford a teacher lol) because i failed gcse maths and sixth form is making me resit

That's not true either!

(x + 4)(x + 4) = x^2 + 8x + 16.

Have you covered multiplying brackets in class?