What Is The Answer Of This 4x2-225=0?

What is the answer of this 4x2-225=0?

 

Answer:

x=15/2 or -15/2

in decimal,

x=7.5 or -7.5

Step-by-step explanation:

4x²−225=0

add 225 both sides

4x²=225

divide both sides by 4

x²=225/4

x=±√225/4

x=±15/2

x=±7.5

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