8th Grade Algebra: Radicals
posted by Joy .
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?

just answered that in
http://www.jiskha.com/display.cgi?id=1232413142 
1. (3+2sqrt 20 )(5+3sqrt 45) ???
use FOIL
15 + 9 sqrt(900) + 10 sqrt(900) + 900
but sqrt 900 = 30
so 15 + 19*30 + 900
2. The length and width of the rectangle are x5 and 2x6
a. Write a trinomial that represents that area of the rectangle.
(x5)(2x6) = 2 x^2 16 x + 30
b. What is the smallest integer value of x that will give positive values for the length and the width of the rectangle?
If x is <5, length is negative
if x < 3, width is negative
so 3 
I multiplied wrong, when I foiled.
Respond to this Question
Similar Questions

Geometry Help
The length of a rectangle is 2 cm more that 5 times it's width. If the area of the rectangle is 84 cm^2 find the dimensions of the rectangle to the nearest thousandth. This is what I have..is it rihgt? 
8th Grade AlgebraRadicals:Answer Check
Change each decimal to a fraction in lowest terms. 1) 0.4242.... Answer: 14/33 2)0.58 Answer: 29/50 3)0.14 (Repeating sign over both numbers) Answer: 14/99 Write each expression in simplest form. ( means that it is inside a square … 
8th Grade Algebra:Radicals
{ this means means square root How do you solve these kind of radicals: 1. (5{14)*(3{2) 2. (4{2+2)*(3{31) Can someone show me how to do these correctly please ? 
8th Grade Algebra
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 … 
Algebra 8th grade
The length of a rectangle is twice its width. If the area is 30 square units, find the dimensions of the rectangle. 
Math simplifying mixed radicals
Please help me simplify these following mixed radicals:: and show me how you did it cause I need to learn : I don't know how to type a square root sign so I just wrote square root: 2 square root 48 3 square root 81 6 square root 12 … 
Math simplifying mixed radicals
Please help me simplify these following mixed radicals:: and show me how you did it cause I need to learn : I don't know how to type a square root sign so I just wrote square root and the numbers infront of the square root are supposed … 
Algebra Homework, HELP!
1) A rectangle has an area of 297 square inches and a width which is three inches less than four times the length. Find the length and the width of the rectangle. 2) Let x represent the length of the shorter leg in a right triangle. … 
coordinate algebra
The area of a rectangle is found by multiplying the length by the width: A = lw. A certain rectangle has an area of x2 + 7x + 12. Factor the trinomial to find the length and width of the rectangle. In the form of a paragraph, describe … 
Calculus
A rectangle is bounded by the x axis and the semicircle = square root 25x^2. What length and width should the rectangle have so that its area is a maximum?