What is the factored form of the expression?

1.) d^2-13d+30
- (d+10)(d+3)
- (d+10)(d-3)
- (d-10)(d+3)
- (d-10)(d-3)

2.) x^2+13xy+36y^2
- (x-4y)(x-9y)
- (x+4y)(x-9y)
- (x+4y)(x+9y)
- (x-4y)(x+9y)

Question

What is the factored form of the expression? 

1.) d^2-13d+30
     - (d+10)(d+3)
     - (d+10)(d-3)
     - (d-10)(d+3)
     - (d-10)(d-3)

2.) x^2+13xy+36y^2
      - (x-4y)(x-9y)
      - (x+4y)(x-9y)
      - (x+4y)(x+9y)
      - (x-4y)(x+9y)

***[isuru]*** · Answer

Hi,
    for ur 1st part
        d^2 -13d + 30 can be written as
                     d^2 -3d -10 -30
       now can u figure out which term can be use to factorize this ?

anonymous · Answer

Thank you, that helped! :)

***[isuru]*** · Answer

u r welcome!! Can u do it for the 2nd part ?