Question

Solve

15x^2 − 15x − 30 = 0
by completing the square.
a) What is the missing term required to
form a square trinomial?

Answer 1

Step 1: Factor left side of equation.
15(x+1)(x−2)=0
Step 2: Set factors equal to 0.
x+1=0 or x−2=0
x=−1 or x=2
Answer:
x=−1 or x=2