Question

Please answer these three questions step by step method wise please ​

Answer 1

Step-by-step explanation:

a) (3-4xy)^2

= (3)^2+(4xy)^2-2(3)(4xy)

9+16x^2y^2-24xy

16x^2y^2-24xy+9=0

b) 25y^2-120y+144=0

c) a^4+b^4-2a^2b^2