Posted by Joy on Monday, January 19, 2009 at 7:59pm.
Find each product.
{ this means the square root sign.
1. (3+2{20)(5+3{45)
2. The length and width of the rectangle are x5 and 2x6
a. Write a trinomial that represents that area of the rectangle.
b. What is the smallest integer value of x that will give positive values for the length and the width of the rectangle?

8th Grade Algebra  Mike, Monday, January 19, 2009 at 8:02pm
This would really be
(5SQRT20)(8SQRT45)
ROunded
(22.4) (53.7)
IM not sure if you have to mulitply these, but if you do.....this would be youe answers
1202.88
Hope this helps.

8th Grade Algebra  Joy, Monday, January 19, 2009 at 8:12pm
I am talking about Radicals, not actaully calculating the square roots.
My book says that the answer is
195 + 47*{5
I just don't get how they got that answer.

8th Grade Algebra  Reiny, Monday, January 19, 2009 at 8:39pm
(3+2√20)(5+3√45)
multiply it using FOIL
= 15 + 9√45 + 10√20 + 6√900
= 15 + 27√5 + 20√5 + 180
= 195 + 47√5
for the second, just multiply the two expression, and again use FOIL
(x5)(2x6)
= .....
For the third part, look at x5
isn't that positive for all values of x > 5 ???
what about the 2x6 ??

8th Grade Algebra  giancarlo, Thursday, August 30, 2012 at 10:36pm
spce./ the diameter of mars is about 9.4 kilometers. write 9.4 as a product. then find the value of the product.
Answer This Question
Related Questions
 8th Grade Algebra: Radicals  Find each product. { this means the square root ...
 coordinate algebra  The area of a rectangle is found by multiplying the length ...
 Algebra 8th grade  The length of a rectangle is twice its width. If the area is...
 Geometry Help  The length of a rectangle is 2 cm more that 5 times it's width. ...
 Calculus  A rectangle is bounded by the x axis and the semicircle = square root...
 Algebra  A rectangle has a width of 2(square root of 5)and an area of 50 cm^2. ...
 Algebra Homework, HELP!  1) A rectangle has an area of 297 square inches and a...
 prealgebra  Can you help me figure this? The area of a rectangle is 14 square ...
 9th grade polynomials  How do you write the expression for the area of the ...
 algebra  The length of a rectangle is 3 more than twice the width. The area of ...
More Related Questions