One coefficient must be positive and the other must be negative: A > 0, B < 0 or A < 0, B > 0
Example: 9x²-4y²-54x-16y+23=0
Here are the steps:
REMINDER:
Prepare your pen and a piece of paper for writing your answers.
Given:
STEP 1: Regroup the coefficient x and coefficient y and bring the constant on the right side of the equation and change its sign.
STEP 2: Bring out the common factor of the coefficient x and coefficient y.
STEP 3: By using the completing the square, get the perfect square trinomial of coefficient x and coefficient y.
STEP 4: Along with the constant on the right side of the equation, put also the common factor to make it balance then multiply it to the square (n²)of the perfect square trinomial of the coefficient x and coefficient y.
STEP 5: Simplify the right side of the equation and make the perfect square trinomial into square of binomial.
STEP 6: Divide both sides of the equation by the constant on the right side, then simplify.
Final Answer:
The formula for getting the c value is √c² = √a² + √b².