SOLUTION: I need help with the following:
Multiply and then simplify completely: (3√7−5√5)(3√7+5√5)
I have come up with several answer and I am having tro
Algebra.Com
Question 1021526: I need help with the following:
Multiply and then simplify completely: (3√7−5√5)(3√7+5√5)
I have come up with several answer and I am having trouble showing my work
Found 2 solutions by ankor@dixie-net.com, josmiceli:
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Multiply and then simplify completely:
This FOILs as the difference of squares, the middle terms cancel so we have
9(7) - 25(5) = 63 - 125 = -62
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let
Let
--------------------
Make this substitution:
---------------------------
and
----------------
------------------
check answer:
I'll do it with calculator:
I assume the error is due to rounding off
RELATED QUESTIONS
Hi,I desperately need help with the following questions:
1. Square root n^2 + 12n +... (answered by jim_thompson5910)
i am asked to multiply
(√[3] + 4√[5])(2√[3] –... (answered by checkley77)
Rational and Radical Expressions
1. Simplify the rational expression:
x2 – 6x – 7
(answered by gladley)
1. Simplify the rational expression: Please show work
x2 – 6x – 7
x2 – 1... (answered by checkley71)
simplify (5√ 3+7)(-2√ 3-3√... (answered by alicealc)
Multiply:
(5√[2] + 3)(√[2] – 2√[3])
(answered by stanbon,MathLover1)
Multiply:
(5√[2] + 3)(√[2] – 2√[3])
(answered by Fombitz)
PLEASE PLEASE PLEASE PLEASE PLEASE HELP ME.
√(2)[√(4y) - √(18)]... (answered by stanbon)
Simplify... (answered by stanbon)
Rational and Radical Expressions
1. Simplify the rational expression:
x2 – 6x – 7
(answered by Edwin McCravy)