Answer:
1. [tex]-14x^4y^3-21x^3y^2 + 28 x^2y^2[/tex]
Distribute -7xy to every term inside the parenthesis
For the first term: [tex]-7xy(2x^3y^2) \\ (-7)*(2) = -14 \\(x) (x^3) = x^4\\(y)(y^2) = y^3 \\=-14x^4y^3[/tex]
For the second term: [tex]-7xy(3x^2y) \\ (-7)*(3) = -21 \\(x) (x^2) = x^3\\ (y)(y) = y^2 \\=-21x^3y^2[/tex]
For the third term: [tex]-7xy(-4xy) \\ (-7)*(-4) = 28 \\(x) (x) = x^2\\ (y)(y) = y^2 \\=28x^2y^2[/tex]
2. [tex]2x+16 +\frac{22}{x -2}[/tex] {use the long method in division)
3. [tex]25a^2 - 9[/tex] {Using foil method for binomial - First Outer Inner Last}
