x^2-3x-40 into equivalent form as products of linear factors

Question

I need all of these quadradic expressions put in equivalent form as products of linear factors please!

x^2-3x-40

x^2-9x+20

x^2+7x-60

x^2-49

Thank you SO much

Answer 1

x^2-3x-40=0

(x-8)(x+5)=0

..........