Assignment:
Q1. Solve: 7^3x-4=49
Q2. Let f(x)=x^2+10x40
-find vertex
-state the range of the function
-on what interval is the function increasing?
Q3. Multiply and Simplify (7+6i)(2+9i)
Write the answer in the form a+bi, where a and b are real numbers.
Provide complete and step by step solution for the question and show calculations and use formulas.