Question

factorise (y-x)a+(x-y)b

Answer 1

(y-x)a + (x-y)b= -a(x-y) + b(x-y)
                       = (x-y)(b-a)

I hope its answer your question and I am sorry if it is wrong

Answer 2

Answer:

e=mc²

Step-by-step explanation:

e=energy m=mass c=speed of light (3x10⁸ m/s)