Answer in screen shot below
Answer: subtraction
Reasoning: You need to subtract 3 from both sides first.
What multiplied by (x-4) would make x2+5x-36
Answer:
The answer is
or
.
Step-by-step explanation:
Solve the following equation:

-Multiply
and
to get

So, now you have found the answer.
Answer = 1.414
I used the prime factorization method.
Hope this answers your question.