I'm stuck on this one...
simplify by combining like terms:
5sqrt8 + 2sqrt18
2006-11-12 13:06:46 · 4 answers · asked by J&V 1 in Science & Mathematics ➔ Mathematics
5√8 = 5x√(4x2) = 5x2√2 = 10√2
2√18 = 2x√(9x2) = 2x3√2 = 6√2
Now you can add the like terms to get 16√2.
2006-11-12 13:11:45 · answer #1 · answered by just♪wondering 7 · 0⤊ 0⤋
look at each square root and see if you can rewrite it:
â8 = â(2*2*2) = 2 â2
â18 = â(2*3*3) = 3 â2
So, 5â8 + 2â18 =
5*2â2 + 2*3â2 =
10â2 + 6â2 =
16â2
NRT
2006-11-12 21:10:48 · answer #2 · answered by New Rule Tomorrow 2 · 0⤊ 0⤋
first is 5+2=7 then the terms sqrt8+sqrt18=7sqrt and the 8 and 18 is it to the power of or then you add them
2006-11-12 21:11:26 · answer #3 · answered by A 1 · 0⤊ 0⤋
sqrt8 = 2sqrt 2
sqrt18 = 3 sqrt 2
so 5sqrt8 + 2sqrt18 = 5*2sqrt2 + 2*3sqrt2 = (10+6)sqrt2 =
16sqrt2
2006-11-12 21:10:28 · answer #4 · answered by Steve A 7 · 1⤊ 0⤋