(8x-3)(x+1), middle term is 5x, nope (8x+3)(x-1), middle term is -5x, nope (8x-1)(x+3), middle term is 23x, nope (8x+1)(x-3), middle term is -23x,nope (2x-3)(4x+1), middle term is -10x,nope (2x+3)(4x-1), middle term is 10x, nope (2x+1)(4x-3). milddle term is -2x, nope (2x-1)(4x+3), middle term is 2x, YES
500=4πr^2. first divide 500 from four which will equal 125, then divide 125 with π and it will equal 39.788 . finally √39.788. the answer will be r=6.3 or 6
