50 points  which expression represents 4x^2-9 in factored form 1.) (3x+2)(3x-2) -3)(2x-3) +3)(2x+3) +3)(2x-3) which expression represents x^2-8x+16 in factored form +4)(x-4) -4)^2 -x)(x-8) +4)^2 which expression represents x^2+7x-60 in factored form -6)(x+10) +5)(x-12) -5)(x-12) -5)(x+12)