1.)
(√2-5)(√2+5)
2.)
(√2-5)(√2+5)
3.)
√9 x √8 (It reads the square root of 9 times the square root of 8)
2006-07-25 09:03:19 · 5 answers · asked by Brandon ツ 3 in Science & Mathematics ➔ Mathematics
1) (√2-5)(√2+5) = 2 +5√2 - 5√2 - 25 = 2 - 25 = -23
2) same as 1)
3) √9 x √8 = √(3*3) x √(4*2) = 3 x 2√2
= 6√2
2006-07-25 09:09:55 · answer #1 · answered by Anonymous · 3⤊ 1⤋
2-25 = -23
â9 x â8 = 3 x 2â2 = 6â2
2006-07-25 16:07:41 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 0⤋
#1: (â2-5)(â2+5)=2-25=-23
#2: same deal
#3: 6â2
2006-07-25 16:07:45 · answer #3 · answered by Pascal 7 · 0⤊ 0⤋
1) 2+sqrt2*5-sqrt2*5-25
= 2-25
= -23
2) This is the same question as 1
3) sqrt(9*8)
=sqrt72
=sqrt(2*2*2*3*3)
=sqrt(4*2*9)
=2*3*sqrt2
2006-07-25 16:37:49 · answer #4 · answered by Science_Guy 4 · 0⤊ 0⤋
1.)
(sqrt(2) - 5)(sqrt(2) + 5)
(sqrt(2))^2 + 5sqrt(2) - 5sqrt(2) - 25
2 - 25
ANS : -23
---------------------------
2.)
Same as 1.
-----------------------
3.)
sqrt(9) * sqrt(8)
sqrt(9 * 8)
sqrt(3^2 * 2^2 * 2)
(3 * 2)sqrt(2)
6sqrt(2)
2006-07-25 22:18:59 · answer #5 · answered by Sherman81 6 · 0⤊ 0⤋