Question

Can you explain to me how to factor a trinomial? 25a2 - 70a + 49

Answer 1

25a^2 - 70a + 49 =(5x-7)^2

Answer 2

alright but how did you get that answer?

Answer 3

by the cross shown in my drawing

Answer 4

Do you know this method?

Answer 5

no... :/

Answer 6

Let me try to explain it :D

Answer 7

thanks :)

Answer 8

25 = 5x5
49 =(-7)*(-7)

-35 -35 =-70 which is the coeff of x term