Question

What is the vertex of m2 - 20m + 72 = -3?

Answer 1

m2−20m+72=−3

Step 1: Subtract -3 from both sides.

m2−20m+72−(−3)=−3−(−3)

m2−20m+75=0

Step 2: Factor left side of equation.

(m−5)(m−15)=0

Step 3: Set factors equal to 0.

m−5=0 or m−15=0

m=5 or m=15

Answer:

m=5 or m=15