Question

Help me solve this please

Answer 1

Solve the quadratic equations using the indicated method in Parts A and B.

Part A: Solve the quadratic equation x2 + 2x − 15 = 0 by factoring.

Part B: Verify your answer for Part A by solving the quadratic equation x2 + 2x − 15 = 0 by completing the square.

Answer 2

I'm doing this too & hate it. Lol good luck!

Answer 3

can you list two numbers that when you multiply them you get 15 ?

Answer 4

or, from 1 to 4, which numbers divide evenly into 15 ?

Answer 5

theres 3 and 5

Answer 6

also 1 and 15

so make the list
1,15
3,5
those are all the pairs that when you multiply you get 15

Answer 7

\[x^2 + 2x − 15 = 0\]
next: in -15 (the last term) the minus sign means
*the two factors have different signs*

Answer 8

in the +2x
the + means the largest factor is +
and because we know we have different signs the other factor is -

so we must have
-1,+15
or
-3,+5

now add the pairs
we get

-1+15= 14
-3+5=2

pick the pair that give a +2 (to match the +2x of the original equation)

Answer 9

so put in -3 and +5 into
(x ) (x )
to get
(x-3)(x+5)

Answer 10

thank you so much