The rectangle below has an area of 15k^4+35k^3+20k^2 what is the length and width of the rectangle

2 cm is the length of the rectangle

step - by - step explanation : The following are the tips on how to recognize a perfect square trinomial: ... If the first and last terms are perfect squares, and the middle term's coefficient is twice the product of the square roots of the first and last terms, then the expression is a perfect square trinomial.