Which shows a perfect square trinomial? 50 y squared minus 4 x squared 100 minus 36 x squared y squared 16 x squared + 24 x y + 9 y squared 49 x squared minus 70 x y + 10 y squared

100-36x^2y^2

Step-by-step explanation:

100-36x^2y^2 =

(10-6xy)(10+6xy)

Because x^2-y^2 = (x+y)(x-y)

d (5 x (-20)) * (100 x (0.7))

step-by-step explanation:

5÷1/100 * -.7 *-20

copy dot flip

5*100 * -.7 *-20

rearrange

5*-20   * 100 *-.7

-100   *-70

7000

answer: i believe its b. if you sound out the sentences that sounds wrong.