Question

please bro or sis answer me please​

Answer 1

Answer:

hlo

Step-by-step explanation:

1.(5x-4y) (5x+4y).

it is in form (a+b)(a-b )

=a^2-b^2. 25x^2-16y^2. hope it helps.

2.(a + b + c)2 = (a + x)2 = a2 + 2ax + x2

= a2 + 2a (b + c) + (b + c)2

= a2 + 2ab + 2ac + (b2 + c2 + 2bc)

= a2 + b2 + c2 + 2ab + 2bc + 2ca

Therefore, (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca

Hope this will help you