Solve (4√ 5+√ 2)(2√ 5-3√ 2)? - what number represents the index of
Can someone please help me and show me your steps when you can .. so we can try to find out. Thank you. Help with one of them or all would be wonderful. =)
J.
1. (4 √ 5 + √ 2) (2 √ 5.3 √ 2)
2. (3 √ 12) (2 √ 32)
3. √ 6 x 5 = 30
4. 50R √ 2 - √ 18r
5. What number represents the amount of 4 √ 81m3n5
Thursday, January 28, 2010
What Number Represents The Index Of Solve (4√ 5+√ 2)(2√ 5-3√ 2)?
1 comment:
1. (4 √ 5 + √ 2) (2 √ 5.3 √ 2)
= (4 √ 5 √ 2 x 5) + (4 √ 5 √ 2 x -3) + (√ 2 √ 2 x 5) + (-3 √ 2 x √ 2)
= (4 x 2 x 5 x √ √ 5) + (4 x 3 x 5 x √ √ 2) + (2 x 2 x √ √ 5) + (3 x √ 2 x √ 5)
= (8 x 5) + (-12 x √ 10) + (2 x √ 10) + (3 x √ 10)
40 -12 = 10 + 2 √ √ 10 √ 10 -3
40 -13 = √ 10
2. (3 √ 12) (2 √ 32)
= (3 x 4 x √ √ 3) (2 x 16 x √ √ 2)
= (3 x 2 x √ 3) (2 x 4 x √ 2)
= 6 √ 3 x 8 √ 2
= 6 x 8 x √ 3 x √ 2
= 48 √ 6
3. √ 6 x 5 = 30
√ x 6 = 25
√ x = 25 / 6
(√ x) ² = (25 / 6) ²
x = 625/36
(not sure)
4. 50R √ 2 - √ 18r
2 x = √ 25 x √ 2 - √ 9 x √ 2
5 x 2 = √ 2 x 3 x √ 2
= 10 √ 2 to 3 √ 2
7 = √ 2
5. I do not know this part
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