Want to do some algebra 2?!?

Question

i need help. this is factoring completley diffrence of two squares :D

100x*-225y*

d*- .01e*

.09a*-49

(* is exponent number 2, or squared)

Answer 1

25(4x² - 9y²) = 25(2x + 3y)(2x - 3y)

(d + 0.1e)(d - 0.1e)

(0.3a + 7)(0.3a - 7)

Answer 2

(10x + 25y)(10x - 25y)

(d + 0.1e)(d - 0.1e)

(0.3a + 7)(0.3a - 7)