2. Int=sana y=-1, find the values of eac...

2. Int=sana y=-1, find the values of each of the following using in identity (i) (9y2 - 4x²)(81y* + 36x²y2 + 16x*) + 5 - 25 + 2572 A 3. If a + b = 10 and ab = 16, find the value of a? - ab + b2 and a² + ab + b2 4. If a + b = 8 and ab = 6, find the value of a3 + b3 5. If a-b= 6 and ab = 20, find the value of a3 – 63 6. If x=-2 and y = 1, by using an identity find the value of the following:

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