Question

³√4+³√2+1 express in same ​

Answer 1

Answer:

−4)2=+16

−42=−16

(−4)2 means that the −4 is being squared (raised to the 2nd power) — in other words, the −4 is being multiplied by itself. Thus (−4)2=(−4)∗(−4)=+16. This is because multiplying a negative by a negative always yields a positive number. Every time you multiply by a negative, the sign changes!

−42, on the other hand, means that only the 4 is being squared, the negative is not. In other words, it is the opposite of the square of 4. You evaluate 42 first and THEN find the opposite. 42=4∗4=16, and the opposite of 16 is −16, thus −42=−16

Thus the answers for (−4)2 and −42 are different.