# algebra 1

find a value for k that will make 4x^2 + 6.4x + k a perfect square. again this stuff is kicking my behind

1. 👍 0
2. 👎 0
3. 👁 121
1. (2x + 1.6)^2 = 4x^2 + 6.4x + 1.6^2,
so if you make k = 1.6^2 = 2.56, you have a perfect square

1. 👍 0
2. 👎 0
posted by drwls

## Similar Questions

1. ### maths

what least number must be added to 630 to make the sum a perfect square? find the perfect square and its square root.

2. ### math,help

Is this trinomial a perfect square x^2-6x+9 if the trinomial starts with x^2 and 1/2 of the middle term coefficient squared equals the last term, then it is a perfect square. tell me what you found. i thought it was not a perfect

asked by jasmine20 on April 19, 2007
3. ### Math

Which numbers are perfect squares? A) 64 b)900 c)120 d)1000 e)100 F) 10 000 How do u know each number is a perfect square? A) 1225= 35x35 B) 484= 2 x 2 x 11 x 11 C) 2025 = 45(square) the area of this square is 289 square unit. How

asked by Roxane smith on September 11, 2011
4. ### Algebra 2

Replace each of the question marks with a value that will make the polynomial a perfect square trinomial. 1. 4x^2+12x+? 2. ?+90x+81 Could someone show me how to solve these? Take the first: factor out the 4 4x^2+12x+? 4( x^2 + 3x

asked by Christian on May 21, 2007
5. ### Math

How do you simplify 5/¡Ì12? I know you have to multiply the denominator,¡Ì12, by a radical to make a perfect square.. I think you're supposed to multiply it by 12? But there seems to be other numbers multiplied by 12 that can

asked by Angie on May 9, 2009
6. ### Algebra

what is a perfect square number i know 9, 25 and 100, but what else if you multiply a perfect square by a perfect square, is the answer always a perfect square

asked by Cyleste on October 10, 2007
7. ### math

2x is a perfect square, 3x a perfect cube, and 5x a perfect 5th power. Find the sum of the exponents in the prime factorization of the smallest such positive integer x. Thank you.

asked by unowen on June 30, 2017
8. ### Alg2

Find the value of c that will make the expression x^2-15x+c a perfect square. would c = 56.25 ?

asked by Cyn on May 7, 2012
9. ### Math

Find the constant term that should be added to make the following expression a perfect square trinomial. x^2-2x x^2+3x Take one half the second term, square it. 1/2 *2=`1, squred, 1 1/2 *3=3/2, squared, 9/4

asked by Audrey on June 10, 2007
10. ### Math

Find the least number that is multiplied to 1176 t0 make it perfect square.

asked by ABC on May 28, 2017

More Similar Questions