Bill earns $8.00 per hour. He worked 40 hours at the regular rate, 2 hours at time and a half, and 3 hours at double time.
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Given the statements, "a square root of 16 is 4," and "a square root of 9 is -3," complete the following blanks with the correct truth-values. p is and q is , so the statement, "a square root of 16 is 4 or a square root of 9 is -3" is .

Factor this polynomial completely x^2-64

How to do this , and can some one explain