1. 5x²+ (5x)²;x=2
2. √x²+ y²;=6,y=-8
2007-01-24 15:58:25 · 2 answers · asked by guyana_bhai_2003 1 in Education & Reference ➔ Homework Help
Ok
1. 5x²+ (5x)²;x=2
2. √x²+ y²;=6,y=-8
Expression 1. Precedence matters. So the first term and the second term are not the same. In the first term you square x first, then multiply by 5. So x²=4, times 5 = 20. The first term of problem 1. is 20. The second term the parentheses is evaluated first. So 5 times 2 = 10, and 10 squared is 100. So add the first and second terms together you you get 120.
Expression 2
The sqrt reveres the square so we end up with 6, plus -8 squared is (-8)(-8), we get a positive when there is an even number of negatives which is 64. Adding 64+6 we get 70
2007-01-24 16:15:59 · answer #1 · answered by Ron H 6 · 0⤊ 0⤋
i am not sure what you have to do ... but you plug in the numbers and you get 1. is120 and 2. is 70 .... i think
2007-01-25 00:03:05 · answer #2 · answered by toshoa76 2 · 1⤊ 0⤋