Question

pls do this using identity plsss and will MARK us as BRAINLIST ​

Answer 1

Answer:

= 3x^4 - 5y^4

Step-by-step explanation:

BRAINLIEST plz plz plz I not got today

Answer 2

Answer:

9x^4-30x^2y^2+25y^4

Step-by-step explanation:

using identity ( a-b ) ^2

(a-b) ^2 = a^2-2ab+b^2

consider

a=3x^2

b=5x^2

(3x^2)^2 -2(3x^2)(5y^2) +(5y^2)^2

==9x^4-30x^2y^2+25y^4