Question

If a2 + b2 = 34 and ab = 12; find :
(i) 3(a + b)2 + 5(a - b)2
(ii) 7(a - b)2 - 2(a + b)​

Answer 1

Answer:

i) 224

Step-by-step explanation:

i) 3(a + b)2 + 5(a - b)2

= 3( a2 + b2+2ab)+ 5( a2 + b2-2ab)

= 3( 34+2*12)+5(34-2*12)

=3(34+24)+5(34-24)

=3*58+5*10

= 174+50

=224

ii) 7(a - b)2 - 2(a + b)

= 7( a2 + b2-2ab)-2( a2 + b2+2ab)

= 7(34-24)-2(34+24)

= 7*10-2*58

= 70- 116

= -46

( I think you didn't finish the question)

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Answer 2

Answer:

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