Question

if a+b+c=5, Find 3 (a+b)² -2(a-b) ² ​

Answer 1

• a =2 , b =2 , c =1
• 2+2+1 = 5
• 3(2+2)² = 3(2² + 2²)
• = 3 (4+4) = 3(8) = 24
• 2(2-2)² = 2(2²-2²)
• = 2 (4-4) = 2(0) = 0
• 24-0
• =24