simplify both questions
1) 8 + square root of 28 over 2
2) square root of 7 (9 square root of 5 minus 3 square root of 7)
2006-11-03 13:16:25 · 6 answers · asked by jazminda S 1 in Science & Mathematics ➔ Mathematics
Do you mean:
(8 + sqrt(28)) / 2?
1) [8 + sqrt(4)sqrt(7)] / 2
= 4 + sqrt(7)
2) sqrt(7) * (9 * sqrt(5) - 3 * sqrt(7) )
= 9 * sqrt(5) * sqrt(7) - 3 * sqrt(7) * sqrt(7)
= 9 * sqrt(35) - 3 * 7
= 9 * sqrt(35) - 21
= 3 ( 3 sqrt(35) - 7 )
2006-11-03 13:24:13 · answer #1 · answered by Puzzling 7 · 0⤊ 1⤋
1. 8 + √7
because (√28) / 2 = √(7*4) / 2 = (2√7)/2 = √7
2. √7(9√5 - 3√7) = 9√35 - 3√7√7 = 9√35 - 21
.
2006-11-03 13:18:26 · answer #2 · answered by I ♥ AUG 6 · 0⤊ 1⤋
1) If you mean 8 + sqrt(28) / 2 then:
8 + sqrt(7)
But if you mean
[8 + sqrt(28)] / 2
= [8 + 2 sqrt(7)] / 2
= 4 + sqrt(7)
2006-11-03 15:39:48 · answer #3 · answered by Chie 5 · 0⤊ 0⤋
1. 8 + sqrt(28)/2
= 8 + 2sqrt(7)/2
= 8 + sqrt(7)
2. sqrt(7) * (9sqrt(5) - 3 sqrt(7)
= 9 sqrt(35) - 3 sqrt(49)
= 9 sqrt(35) - 21
2006-11-03 13:24:58 · answer #4 · answered by bhen 3 · 0⤊ 1⤋
1) 8+sqrt(28)/2=8+sqrt(7)
2) sqrt(7)*(9sqrt(5)-3sqrt(7)=9*sqrt(35)-3*7
= -21+9*sqrt(35)
2006-11-03 16:21:22 · answer #5 · answered by yupchagee 7 · 0⤊ 0⤋
(28) = 2(7) *the parenthesis is the square root symbol then 4 and 8 cancel out. the answer is (7) *the parenthesis is the square root symbol
2016-05-21 22:03:25 · answer #6 · answered by Teresa 4 · 0⤊ 0⤋