Question

3.Write the product as a trinomial. (2r – 5)(r + 10)

Answer 1

Use: (a + b)(c + d) = ac + ad + bc + bd

$(2r-5)(r+10)=(2r)(r)+(2r)(10)+(-5)(r)+(-5)(10)=2r^2+20r-5r-50=2r^2+15r-50$

Answer: b. 2r² + 15r - 50

Answer 2

B is the correct answer