Question

Work out the value of 2$x^{2}$-4y when x=6 and y=2 a)64 b)60 c)72 d)17

Answer 1

Answer:

Refer to the attachment above

Answer 2

Find the square root of 784 by the long-division method.

Solution:

Marking periods and using the long-division method,

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Therefore, √784 = 28