Question

expand the expression (3d+1) (5-2d)​

Answer 1

Answer:

Step-by-step explanation:

=15d+5-6dsquare-2d

=-6dsquare+13d+5

Answer 2

Answer:

$(3d + 1)(5 - 2d) \\ \\ = > 15d - 6d ^{2} + 5 - 2d \\ \\ \\ = > 13d - 6 {d}^{2} + 5 = 0\\ \\ = > 6 {d}^{2} - 13d - 5 = 0 \\ \\ = > 6 {d}^{2} - 15d + 2d - 5 = 0 \\ \\ \\ = > 3d(2d - 5) + 1(2d - 5) = 0 \\ \\ \\ = > (3d + 5)(2d - 5) = 0 \\ \\ \\ = > 3d + 5 = 0 \\ \\ d = \frac{ - 5}{3} \\ \\ \\ 2d - 5 = 0 \\ \\ = > d = \frac{5}{2}$

please mark me brainlist ✔️✔️✔️