need help on these

Question

need help on these

anonymous · Answer

here is attachment all of them

anonymous · Answer

So basically quadratic formula should be written
$$ax ^{2}+bx+c=0$$

So the first one would be
a=1,b=3,c=2

anonymous · Answer

looks like some factor and some do not

anonymous · Answer

$$y=-b \pm \sqrt{b^2-4ac}/(2a)$$

anonymous · Answer

first one is 
$$(x+1)(x+2)=0$$

anonymous · Answer

second one is 
$$(x-1)^2=0$$

anonymous · Answer

third and 4th do not factor over integers, so you need the formula

anonymous · Answer

The discriminate is
$$b ^{2}-4ac$$
If is is more than 0 there is two solutions
If is equal to 0 there is one solution
If it is less than 0 there are no solutions

So for question 13 it is -7 so there are no solutions

anonymous · Answer

but actually now that i look at the question (always helpful) it does not ask you to solve does it?

anonymous · Answer

only says "identify a, b, c" so your job is only to write them, not to solve !

anonymous · Answer

that should be straightforward enough.  the general form is 
$$ax^2+bx+c=0$$ so only have to pick out what is a, what is b, and what is c