Factor each expression and explain how.

52.
w^2 - 15w - 54

54.
-2h^2 + 4h + 70

52.
w²-15w-54
Factor w and -18 out from the expression
w(x+3)-18(w+3)
Factor out w+3 from the expression
(w-18)(w+3)

54.
-2h²+4h+70
Factor out -2 from the expression
-2(h²-2h-35)
Write -2h as a sum
-2(h²+5h-7h-35)
Factor out h and -7 from the expression
-2(h * (h+5)-7(h+5))
Factor out h+5 from the expression
-2(h-7)(h+5)

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.