What is the product (-2d2+s)(5d2-6s)

=(−2d2+s)(5d2+−6s)

=(−2d2)(5d2)+(−2d2)(−6s)+(s)(5d2)+(s)(−6s)

=−10d4+12d2s+5d2s−6s2

=−10d4+17d2s−6s2

add 5 subtract 1

step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it