Solve the equation below
6. Multiply: (x – 4)(x + 5)
(a) x2 + 5x - 20, (b) x2 - 4x - 20, (c) x2 - x - 20, (d) x2 + x - 20.
(x–4)(x+5)⟹x2−4x+5x−20⟹x2+x−20
(x-4)(x+5)=x^2+x-20=(d) is our final solution.
+46 
