Question from David, a student:
Find all real solution to each equation.
x^-2/3 = 9 how do you do this if its to the power
x + 1= Square root (3x +13) can you explain how to get an solution with square root?
Hi David,
x-2/3 = 9:
9 = 32 so the equation can be written x-2/3 = 32 and hence x-1/3 = 3. Can you complete it now? Make sure you check your answer.
x + 1 = √(3x + 13):
Square both sides to get x2 + 2x + 1 = 3x + 13. Solve this quadratic and again make sure you check your answer.
Penny