Question

(a+2b+c)^2-(a-2b-3c)^2 simplify
plzz solve this step by step​

Answer 1

Answer:

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Step-by-step explanation:

Hi friend,

=>(A-2B-3C)²

=> {(A) + (-2B) + (-3C)}²

we know that,

(A+B+C)² = A²+B² + C² + 2AB + 2BC + 2AC.

=> (A)² + (-2B)² + (-3C)² + 2 × A × (-2B) + 2 × (-2B) × (-3C) + 2 × (-3C) × (A)

=> A² + 4B² + 9C² -4AB + 12BC - 6AC.