1) (2b+3)(3b+3) = 6b^2 + 9b + 9b + 9 = 6b^2 + 18b + 9(2b-8)(3b-5) = 6b^2 - 10b - 24b + 40 = 6b^2 - 34b + 40
2) (x+2)(x-3) = x^2 - 3x + 2x - 6 = x^2 - x - 6
3) (5a+2b)(4a-b) = 20a^2 - 5ab + 8ab - 2b^2 = 20a^2 + 3ab - 2b^2
1) (100m-n)^2 = 10000m^2 - 200mn + n^22) (4a+4b-a+b)^2 = 16a^2 + 16b^2 + a^2 + b^2 + 8ab - 2ab = 17a^2 + 14ab + 17b^23) (x - xy - x + y)^2 = x^2 - 2xy^2 + y^2
1) (2b+3)(3b+3) = 6b^2 + 9b + 9b + 9 = 6b^2 + 18b + 9
(2b-8)(3b-5) = 6b^2 - 10b - 24b + 40 = 6b^2 - 34b + 40
2) (x+2)(x-3) = x^2 - 3x + 2x - 6 = x^2 - x - 6
3) (5a+2b)(4a-b) = 20a^2 - 5ab + 8ab - 2b^2 = 20a^2 + 3ab - 2b^2
1) (100m-n)^2 = 10000m^2 - 200mn + n^2
2) (4a+4b-a+b)^2 = 16a^2 + 16b^2 + a^2 + b^2 + 8ab - 2ab = 17a^2 + 14ab + 17b^2
3) (x - xy - x + y)^2 = x^2 - 2xy^2 + y^2