Question

Can Someone Help Me Check My Work...I Did it all i just want to know if its right :D
Check Comment Box :D

Answer 1

1st Solve by using the perfect squares method.

x^2 + 8x + 16 = 0

2

-2

4

-4

Answer 2

My answer was -4

Answer 3

You're correct.

Answer 4

Cool thank you :D

Answer 5

Solve.

x^2 + 5x + 6 = 0
(Points : 4)
{2, 3}

{-2, -3}

{1,- 6}

{-1, 6}<---- My answer

Answer 6

x^2 + 5x + 6 = 0

the 2nd + sign (in front of the 6) means the two roots have the SAME SIGN (- or +)
the + in front of the 5x means the larger factor is +

you could check your answer by substituting it into the equation. Does -1 work? (I always start with the easiest number)
-1*-1 + 5*-1 +6
2 -5 +6
3
not zero, so -1 is not a root.

to find the factors, list out the factors of 6 (the last number in the equation)
1, 6
2, 3
notice that 2+3=5, (matches the 5 in 5x)
so (x+2)(x+3) are the factors
and the roots are x= -2 and x= -3

Let's check the -2: -2*-2 + 5*-2 +6 = 4-10+6= -6+6=0 Yes, it works.
we could check x= -3 if we really wanted to be sure!