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Please tell me what is -9d×2-d×2

User WGH
by
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2 Answers

1 vote

Answer:

-20d

Explanation:

please tell me what is -9d×2-d×2

-9d×2-d×2

-18d -2d

-20d

User Dragonfry
by
8.8k points
3 votes

Answer:

I believe it's (2d - 1) • (d + 2)

Explanation:

Step-1 : Multiply the coefficient of the first term by the constant 2 • -2 = -4

Step-2 : Find two factors of -4 whose sum equals the coefficient of the middle term, which is 3 .

-4 + 1 = -3

-2 + 2 = 0

-1 + 4 = 3 That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -1 and 4

2d2 - 1d + 4d - 2

Step-4 : Add up the first 2 terms, pulling out like factors :

d • (2d-1)

Add up the last 2 terms, pulling out common factors :

2 • (2d-1)

Step-5 : Add up the four terms of step 4 :

(d+2) • (2d-1)

Which is the desired factorization

Answer - (2d - 1) • (d + 2)

User Ethan
by
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