Answer:
m=7.5,−7.5
Step-by-step explanation:
Let's solve your equation step-by-step.
4m2−225=0
Step 1: Add 225 to both sides.
4m2−225+225=0+225
4m2=225
Step 2: Divide both sides by 4.
4m2
4
=
225
4
m2=
225
4
Step 3: Take square root.
m=±√
225
4
m=7.5,−7.5
