Question

6. If a2 + b2 = 34 and ab = 12 : find;

1. 3 ( a+b )2 + 5(a-b)2
2. 7 (a-b)2 - 2(a+b)2


ans..1 ...224
ans...2... -46​

Answer 1

a²+b²=34, ab=12

1.

3(a+b)²+ 5(a-b)²

= 3a²+3b²+6ab+5a²+5b²-10ab

= 3(a²+b²)+5(a²+b²)-4ab

= 8(a²+b²)-4ab

= 8×34-4×12

= 272-48

= 224

2 sum is same as 1

i hope it will help u

Answer 2

Step-by-step explanation:

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