Question

expand ( 5 a - 3b ) ^2​

Answer 1

Step-by-step explanation:

= (5a)^2 + (3b)^2 - 2(5a * 3b)

= 25a^2 + 9b^2 - 2*15ab

= 25a^2 + 9b^2 - 30ab

hope it helps.....

Answer 2

Answer:

25a²+9b²+30ab.

Step-by-step explanation:

Given,

(5a-3b)²

We know that...

(a-b)² = a²+b²-2ab.

=> (5a-3b)²

=> (5a)²+(-3b)²-2(5a)(-3b)

=> 25a²+9b²+30ab...