Difference of Squares

16x^2 - 25
1. not factorable
2. (4x - 5)(4x - 5)
3. (4x - 5)(4x + 5)
4. (4x + 5)(4x + 5)
n^2 -1
1. (n - 1)^2
2. (n - 1)(n - 1)
3. (n + 1)(n + 1)
4. (n + 1)(n - 1)
m^2 - 16
1. (m - 4)(m - 4)
2. (m - 4)^2
3. (m + 4)(m + 4)
4. (m + 4)(m - 4)
9r^2 - 4
1. (3r + 2)(3r - 2)
2. (2r + 3)(2r -3)
3. (3r + 2)(3r + 2)
4. (3r - 2)(3r - 2)
8X^2 - 2y^2
1. 2(2x - y)(2x - y)
2. 2(2x + y)^2
3. 2(2x + y)(2x + y)
4. 2(2x + y)(2x - y)
9x^2 - 16y^2
1. (3x + 4y)(3x + 4y)
2. (3x - 4y)^2
3. (3x + 4y)(3x - 4y)
4. (3x - 4y)(3x - 4y)
50m^2 - 18n^2
1. 2(5m + 3n)(5m - 3n)
2. 2(25m^2 - 9n^2)
3. 2(5m + 3n)(5m + 3n)
4. 2(5m - 3n)(5m - 3n)
9a^2 + b^2
1. (3a + b)(3a - b)
2. (3a - b)(3a - b)
3. (3a + b)(3a + b)
4. not factorable
36y^2 - 4x^2
1. 4(3y + x)(3y - x)
2. 4(3y - x)(3y - x)
3. 4(9y^2 - x^2)
4. 4(3y + x)(3y + x)
64a^2 - 4b^2
1. (8a + 2b)( 8a - 2b)
2. 4(4a - b)(4a - b)
3. 4(4a + b)(4a - b)
4. 4(16a^2 - b^2)
48a^2 - 27b^2
1. 3(16a^2 - 9b^2)
2. 3(4a + 3b)(4a - 3b)
3. 3(4a + 3b)(4a + 3b)
4. 3(4a - 3b)(4a - 3b)
2x^2 + 32y^2
1. 2(x^2 + 16y^2)
2. 2(x + 4y)(x + 4y)
3. 2(x + 4y)(x 4y)
4. 2(x - 4y)(x - 4y)
x^4 - 16y^4
1. (x^2 + 4y^2)(x^2 - 4y^2)
2. (x^2 - 4y^2)(x^2 - 4y^2)
3. (x^2 + 4)(x+ 2y)(x - 2y)
4. (x^2 + 4)(x- 2y)(x - 2y)
81a^4 - 256y^8
1. (9a^2 + 16y^4)(9a^2 - 16y^4)
2. (9a^2 + 16y^4)(3a + 4y^2)(3a - 4y^2)
3. (9a^2 - 16y^4)(9a^2 - 16y^4)
4. (9a^2 + 16y^4)(3a - 4y^2)(3a - 4y^2)
3y^8 - 27x^6
1. 3(y^4 - 3y^3)(y^4 - 3y^3)
2. 3(y^4 + 3y^3)(y^4 + 3y^3)
3. 3(y^4 - 3y^3)(y^4 + 3y^3)
4. 3(y^8 - 9x^6)