Question

if a2+b2=9and ab=4 find the value of3(a+b)2-2 (a-b)2

Answer 1

3(a+b)²-2(a-b)²
=3(a²+b²+2ab)-2(a²+b²-2ab)
=3(9+8)-2(9-8)
=3(17)-2
=51-2
=49
hope it helps, please mark as brainliest

Answer 2

Question:3(a+b)^2-2(a-b)^2

Step-by step explanation: 3(a^2+b^2+2ab)-2(a^2+b^2-2ab)

3(9+8)-2(9-8)

(27+24)-(18-16)

51-2

49 answer