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which of the binomial below is a factor of this trinomial? x^2+5x-36 A) x^2 +5 B) x+9 C) x-9 D) x-5 please help :)
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which of the binomial below is a factor of this trinomial? x^2+5x-36 A) x^2 +5 B) x+9 C) x-9 D) x-5 please help :)

User Jeff Posnick
by
8.0k points

2 Answers

2 votes
Answer:

D

Step by step:

X^2 + 5x - 36 = 0
(x-4)(x+9) = 0
User KKM
by
7.4k points
7 votes

Answer:

(X+9)

Solution,


{x}^(2) + 5x - 36 \\ = {x}^(2) + (9 - 4)x - 36 \\ = {x}^(2) + 9x - 4x - 36 \\ = x(x + 9) - 4(x + 9) \\ = (x + 9)(x - 4)

hope this helps...

Good luck on your assignment..

User Hwding
by
8.3k points
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