Factorise fully

5x^2-125

Step by step please

5(x+5)(x-5)

Step-by-step explanation:

Given : 5x² - 125

if we express 125 into its constituent prime factors,

125 = 5 x 5 x 5  = 5³

hence our expression becomes:

5x² - 125

= 5x² - (5 x 5 x 5)

= 5x² - 5³    ( factor out 5 from the equation)

= 5 (x² - 5²)   (recall the property a²- b² =  (a+b)(a-b) , apply this to our expression)

= 5(x+5)(x-5)     answer

answer: it is a.,b.,d.

step-by-step explanation: