Question

Factor with steps please!!!
16r^6+8rs+s^2

36x^2-49y^2

18d^4-45d^3+36d^2

x^2+13x+40

Answer 1

So you want to find two numbers that add up to -13 and multiply to 40. You can find the factors of 40 and find the pair that adds up to -13. -8 and -5 multiply to 40 and add up to -13.

(x−5)(x−8)=x2−13x+40

You can use foil to test it

x2+(−8x)+(−5x)+40=x2−13x+40

x2−13x+40=x2−13x+