Solve the equation by completing the square.x2 + 18x + 66 = 0

Solve. + 3 = 5

Solve. = + 4

Perform the indicated operation. Write the result in the form a + bi.(8 – 9i) + (7 + 3i)

Multiply, and then simplify if possible. Assume all variables represent positive real numbers.( + 2)( – 2)

Find the LCD of the rational expressions in the list.,

Simplify. Write the answer with positive exponents.-5×9 ∙ 5×8

Factor the polynomial completely.6(a + 3)2 + 23(a + 3) + 20

Write the number in scientific notation.0.0000011416

Solve.One number is 4 less than a second number. Twice the second number is 22 less than 5 times the first. Find the two numbers.