## donnie1999 one year ago Select the factored form of the expression. If it cannot be factored, select” already in factored form” 100x^2-9 a. (10x+9)(10x-9) b. (10x+3)(10x-3) c. Already in factored form d. (10x-3)(10x-3)

1. Nnesha

difference of square $\huge\rm a^2 - b^2 = (a+b)(a-b)$

2. donnie1999

@Nnesha im confused

3. Nnesha

take square root of first term and square root of 2nd term write ur answer (sqrt of first number + sqrt of 2nd number ) (sqrt of first number - sqrt of 2nd number )