Question

10 points (d+6)(2d2−d+7)

Answer 1

(d+6) (2d)(2-d+7)

Explanation:

(d+6) (2d)(9-d)

(d+6)(18d-2d²)

(d+6)(2d²-18d)

(d+6)(2(9)-18(9)

(d+6)(18-162)

(d+6)(-144)

-144d-54=0.......... multiply the given equation

with(-) minus

144d+54=0

d=54\144

d=1/2.67

Answer 2

It’s 4d-5=2d+7 try my best