The estimation of the product would be around 15,600 because if you round 5,186, it will become 5,200. multiply that by 3, and that's where you get your answer
{(3x)}^{2}-2(3x)(5)+{5}^{2}
−2(3x)(5)+5
2
{(3x-5)}^{2}
I can't help u with this but I can give the formula tn=t1+(n-1)+d
Rectangle A ~ Rectangle B
