i need help factoring polynomials and knowing the steps to reach the answer. 1) x² - 7x + 10 as well as 2) 6r² + 19r - 20

1)  (x-2)(x-5)

2) (6r-5)(r+4)

Step-by-step explanation:

1)

It will just be x since the coefficient is 1

To figure out the second number you need to think of the multiples of 10.  

So either 2 and 5 or 1 and 10.  Since 2 and 5 add to 7 it's them.  

They're negative since 7 is and can still make a positive 10.

2)

This one is more just plugging and guessing to see which on works.

Find the multiples of both 6 and 20, afterwards plug in the multiples til you get 19 in the final product.  

Since 20 was negative the one of the numbers would be negative.  

I can't explain it lol

333.74 ! should be your answer for this question