Question

expand each of the following using suitable identities (-2a + 5b - 3c) ²​

Answer 1

Answer:

here you go

Step-by-step explanation:

use the identity (a+b+c)^2= a square + b square+ c square + 2ab+ 2ac+ 2bc

just replace d values

u will reach to the correct answer

hope it helps

Answer 2

Answer:

Here is your answer mate!      

Step-by-step explanation:                

Q: (-2a + 5b -3c)²      FORMULA: (a +b +c)²= a² + b² + c² +2ab +2bc +2ca

= (-2a)² + (5b)² +(-3c)² +2(-2a)(5b) + 2(5b)(-3c) + 2(-3c)(-2a)

= 4a² + 25b² + 9c² -20ab -30bc +12ac

Hope you understood!

Thanks and regards,

Suriya.

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