Question

Factor: 5x2 – 15x – 20.

(a) 5(x-4)(x+1),

(b) -2(x-4)(x+5),

(c) -5(x+4)(x-1),

(d) 5(x+4)(x+1).
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Answer 1

Answer:

Option-A

Step-by-step explanation:

$\sf{5x {}^{2} - 15x - 20}\\ \\ \sf{5(x {}^{2} - 3x - 4)} \\ \\ \sf{5(x {}^{2} - 4x + x - 4)} \\ \\ \sf{5(x(x - 4) + 1(x - 4))} \\ \\ \sf{5(x - 4)(x + 1)}$

Hence, Option $\rm{A}$ is the correct answer.

Answer 2

Answer:-

answer (a)

Step-by-step explanation:

5x2−15x−205

(x2−3x−4)

5(x2−4x+x−4)

5(x(x−4)+1(x−4))

5(x−4)(x+1)

Hence, {A} is the correct answer.

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