Question

Find the missing coefficient. (5d − 7)(5d − 6) = 25d2 ++ 42 5 65 –5 –65

Answer 1

i do believe it is -65d because the equation will look like this in the end
-65d=-65d.

Answer 2

-65d

Explanation:

(5d − 7)(5d − 6)

`(5d - 7)(5d - 6)`

Multiply it using FOIL method to find the missing term

Multiply 5d inside the second parenthesis and then multiply -7 inside second parenthesis

`5d \cdot 5d= 25d^2`

`5d \cdot -6= -30d^2`

`-7 \cdot 5d=-35d`

`-7 \cdot -6=42`

Now write all the terms together

`25d^2-30d-35d+42`

Combine like terms

`25d^2-65d+42`

HEre -65d is missing