6. If a2 + b2 = 34 and ab = 12; find :
7(a - b)2 – 2(a + b)2
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Answered by
12
Answer:
Please see the attachment
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Answered by
0
Answer:
-46
Step-by-step explanation:
7(a-b)²-2(a+b)²
=7(a²+b²-2ab)-3(a²+b²+2ab)
=5(a²+b²)-18ab
=5(34)-18(12)
=170-126
=-46
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