Answered

which of the followings is the factor form of a²-2a-15​

Sagot :

Billysanchez0912viz

Answer:

a2+2a−15

Consider the form

x2+bx+c

. Find a pair of integers whose product is

c and whose sum is b

. In this case, whose product is

−15 and whose sum is 2.−3,5

Write the factored form using these integers.

(a−3)(a+5)

Step-by-step explanation:

hope it's help

Chitogebestgirlviz

Answer:

(a+3)(a−5)

Step-by-step explanation:

Let's factor a²−2a−15  

The middle number is -2 and the last number is -15.

Factoring means we want something like

(a+_)(a+_)

We need two numbers that  Add together to get -2  and Multiply together to get -15

Try 3 and -5:

3+-5 = -2

3*-5 = -15

Fill in the blanks in

(a+_)(a+_)

with 3 and -5 to get

=(a+3)(a-5)