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brilliants [131]
3 years ago
11

Find the missing coefficient. (5d-7)(5d-6)=25d^2+__d+42

Mathematics
2 answers:
krok68 [10]3 years ago
6 0

Answer:

-65

Step-by-step explanation:

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

5d(5d)+5d(-6)-7(5d)-7(-6)

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

25d^2+-65d+42

The missing coefficient of d is -65.

andrezito [222]3 years ago
6 0

Answer:

25d^2 -65d +42

Step-by-step explanation:

(5d-7)(5d-6)=25d^2+__d+42

FOIL

(5d-7)(5d-6)=

First  5d*5d = 25d^2

Outer  5d*-6 = -30d

Inner  -7*5d = -35d

Last = -7*-6 = 42

Add them together

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

25d^2 -65d +42

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