Perhaps the most concise way to factor is by "completing the square" which is how the quadratic formula is derived...
x^2+6x+8=0 move constant to other side, subtract 8 from both sides
x^2+6x=-8, halve the linear coefficient, square it, then add that to both sides, in this case (6/2)^2=3^2=9
x^2+6x+9=1 now the left side is a perfect square of the form
(x+3)^2=1 take the square root of both sides
x+3=±√1 subtract 3 from both sides
x=-3±√1
x=-3±1
x=-4 and -2
Since the zeros occur when x=-4 and -2 the factors of the equation are:
(x+2)(x+4)
Answer:
mb = 30
Step-by-step explanation:
i got it from me school
Answer:
Y= 2x+10
Step-by-step explanation:
(-2, 6), (-1, 8), (0, 10), (1, 12), (2, 14)
You add 2 every time
Answer:
439.2 miles
Step-by-step explanation:
multiply the days she traveled to the amount of mile she traveled a day
8×59.4 =439.2 miles