Question

Factor 81x²-25. Remember there is no middle term. This is a sum and difference of 2 squares.

Answer 1

Hey there!!

Basic formula :

... a² - b² = ( a + b ) ( a - b )

Equation given :

... 81x² - 25

... ( 9x )² - ( 5 )²

... ( 9x + 5 ) ( 9x - 5 )

Hope it helps!!